Question

why do people use different material to build their house?​

Answer 1

As far as I know, it's based on availability of materials. Scotland for example has a lot more stone than trees, so many of the rural and historic structures are built from stone. The US has lots of trees, not so much easy access to stone, so houses are built from wood. It's the same story with places that have neither, and build their homes from mud and straw.

Hope the ans was clear