A severe drought affected a grassland for ten years. Over that time the average size of mice has decreased. What effect describes the drought?
A. Selection force
B. Genetic pressure
C. Breeding pressure
D. Selective pressure

Question

A severe drought affected a grassland for ten years. Over that time the average size of mice has decreased. What effect describes the drought? 
	A.	Selection force
	B.	Genetic pressure
	C.	Breeding pressure
	D.	Selective pressure

anonymous · Answer

Periods of droughts can have significant environmental, agricultural, health, economic and social consequences. The effect varies according to vulnerability. For example, subsistence farmers are more likely to migrate during drought because they do not have alternative food sources. Areas with populations that depend on as a major food source are more vulnerable to famine.

anonymous · Answer

okay?

anonymous · Answer

http://www.sciencedaily.com/releases/2012/07/120729142137.htm your answer is in the lnk