This map shows southeast asia - an area made up of countries that have been grouped together. if you were studying why these areas were grouped together, which of the essential elements of geography would you be using? a. environment and society b. the world in spatial terms c. places and regions d. physical systems

C. places and regions

Explanation:

The main categories of geography are: landscape, territory, region and place. For this reason, if you want to study why specific areas were grouped, you should review those categories.  For this reason, the correct choice for your question is the letter C.

The region is an area or space that has been divided according to a specific criterion. It is a rational human elaboration to better understand a particular area or an aspect of it. Thus, regions can be created to conduct studies on the general characteristics of a territory or to understand certain aspects of space

On the other hand, the place is a category widely used by those thinkers who prefer to construct a comprehensive conception of Geography. The place can be defined as the perceived space, that is, a certain area or point of space in the way they are understood by human reason.

a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.

according to my calculation, the answer is d.