Because 'back in the day' there were no cars or anything so instead of dogs to pull a sleigh they needed something to get height so they used reindeer ;)
with Reindeer
On his sleigh? Reins. Santa puts reins on his reindeer that are attached to his sleigh. :D
Reindeer
It's a sleigh (large sled) but don't think it has another name
Santa's reindeer of course
In winter, Santa Claus uses his reindeer to pull his sleigh and deliver presents to children around the world.
No Santa rides a sleigh which is pulled by reindeer!
There were many reindeer in the forest. The reindeer pulled Santa's sleigh.
Rudolf
Yes
Dasher