Answer:
Water is the limiting factor that the Serengeti plains affect.
Step-by-step explanation:
From the explanation, Serengeti plains experience a seven-month drought during which only 4 inches of rain is received.
This is a limiting factor that maimes the growth and spread of organisms across the plain.
Due to less amounts of rainfall, there shall be minimal growth of vegetation, this in turn shall lead to loess supply of food for organisms and hence higher mortality rate and low birth rate.