Which of the following describes a custom A. doing your homework

C. not littering

B. shaking hands when you greet someone

D. studying geography

Shaking hands when you greet someone

Explanation: When someone offers their hand, you will most likely shake it back. If told to do homework or study, you don't necessarily need t do it, same with littering.

hi there!

question - how does mountainous terrain affect settlements in a region? choose all answers that are correct.

groups trade with each other regularly.

people travel from settlement to settlement.

why: since they travel to go trade or visit it may be harder to get there because of the mountainous terrain.

hope this : )