Question

One example of a changing biotic factor in an ecosystem would be

A) the seasonal migration of birds.
B) the seasonal changes in temperature.
C) an increase in sunlight during the summer.
D) an increase in rainfall during the spring.

Answer 1

Biotic factors are directly living things. Since temperature, sunlight, and rainfall aren't alive, your answer would be A) the seasonal migration of birds.

Answer 2

Your answer is A.

Biotic factors are the living parts of an ecosystem (plants, animals, etc.) and all b, c, and d are abiotic.