What makes life on Earth possible? A
ice and gravity

B
gravity and heat

С
clouds and are

D
water and air

Explore the ways that boundaries influence identity, interaction and exchange. things to consider: what is the race/ethnicity. how easy is it to interact/trade with others.

From the standpoint of geography,a is an internal rendering of an individual's known world

The process by which liquid water changes into water vapour is called what ?