Consider the following scenario: A drought hits the habitat of a semi-aquatic bird population. All ponds dry up, and fish populations decline. There are two groups of birds in the population that differ in leg length and diet. Long-legged birds eat fish, while short-legged birds eat insects. Drought has little effect on insect populations.

Question

What is the main selective pressure in this scenario?



a
drought
b
insect population
c
leg length
d
fish population

Answer 1

d. fish population.