10 points

are easier to work with than reality and can be manipulated.

a. bservations

b. experiments

c. models

Models. Models are smaller versions of difficult scenarios or objects which can easily be manipulated and changed for future scientific knowledge. Hope this helps :)

the answer is tropical areas. the tropical areas obtain more

radiant energy from the sun than they lose to space through terrestrial

radiation, and vice versa for polar areas. earth has an energy remaining in the

tropics and an energy scarcity for the polar areas.

explanation:

this is math not biology xd