What types of techniques did composers of the 20th century use to make their music sound completely different music from other time periods?

well, people who live in cold areas tend to dress with more layers to stay warm.their homes mostly likely have a some sort of heat sorce as well as warm food.

in warm areas homes can have fans, air conditioners, central air to stay cool.people tend to dress in in less layers or thinner layers to stay cool.food that can be served such as ice cream or some type of cool treats