The correct answers were;
1. What Christmas gift has been given to the people of London by the city of Oslo each year since 1947?
The Trafalgar Square Christmas tree is a Christmas tree given to the people of London by the city of Oslo each year since 1947. The tree is prominently displayed in Trafalgar Square from the beginning of December until 6 January.
Although the tradition with an annual Trafalgar Square Christmas tree from Norway began in 1947, as a token of gratitude for British support to Norway during the Second World War, the very first Trafalgar Christmas tree from Norway appeared in 1942. A Norwegian commando, Mons Urangsvåg, had arrived in London shortly before Christmas with two spruce trees, felled during a raid on Stord, an island off the west coast of Norway between Bergen and Haugesund. One of the trees was intended as a gift to the Norwegian king, Haakon VII, who was in exile in Britain, but the other was erected in Trafalgar Square by a group of officers from British naval intelligence and a couple of Norwegian commandos after a dinner at the Savoy.

2. How tall was the largest christmas tree and where was it ?
The world's tallest cut Christmas tree was a 64.6 m (212 ft) Douglas fir (Pseudotsga menziesii) erected and decorated at Northgate Shopping Center, Seattle, Washington, USA, in December 1950. The mall had only opened in April 1950 so this was seen as a way to draw media attention and shoppers.
During transport, the branches were removed and later re-attached by high riggers once the tree was installed. In addition, since tall forest trees have a clean trunk for 20 m (65 ft) or so, branches were collected from several other trees and attached to the lower stem to fill out the crown.
Once completed, 3,600 lights were attached, which had to be powered by a dedicated electrical generator installed next to the tree.
The tree was cut on Mount Rainier, about 20 mi (32 km) outside of Seattle. It required a special escort on the highway during transportation to the shopping mall.

3. Which animal is traditionally associated with Christmas in Sweden and in which town does a large reproduction of this animal often receive a tragic fate?
Dating back to pagan times, the story of the Yule goat has morphed over the centuries, from a sacrifice to the god of harvest, to Saint Nicholas' symbol of control over evil in the 11th century. Later it was seen as the giver of gifts and today it's a traditional ornament in Scandinavian countries, where a straw goat is wrapped in red ribbon and used as a decoration (one you're certain to pick up from a Christmas market in Sweden).

However, this long yuletide history has now made way for a very special annual Christmas tradition: the Swedish town of Gävle's giant goat!
Every year an enormous goat is constructed in Slottstorget Castle Square in Gävle, Sweden, some 200 miles north-west of Stockholm. This gigantic version of the traditional straw Swedish Yule goat stands tall and proud in the square for the whole of the Christmas season, and on its record-breaking year, the gigantic straw goat statue measured a whopping 49ft!
Sadly most years vandals get to the Gävle goat and burn it down. Although illegal, it has become a Christmas tradition and a mark of pride if the goat is able to be destroyed.

Fortunately, the local fire station is just around the corner and the blaze can usually be put out before the goat’s skeleton is damaged, and the city rebuilds the yule goat in time for Christmas.
The Gävle goat has now been damaged or destroyed an astonishing 38 times. Despite this, it is able keep its global fan club updated throughout advent on X.
In order to prevent arson and the yule goat being destroyed, more elaborate security measures are added each year and now include a double fence, 24-hour CCTV and 24 guard patrol with a K9 unit!