Why is understanding demand important to understand how societies answer the basic WHAT, HOW, and FOR WHOM questions? How do we study demand, and how does demand behave?

it is central to the process of deciding WHAT, HOW, and FOR WHOM to produce. In order to study demand, we need to know the price of the product and the quantity available at any given time.

answer; i believe the correct answer is (crops);

the answer your looking for is c. : )