Question

background reading
every year, over 1.5 million wildebeest migrate in the serengeti ecosystem. this is one of the largest animal migrations on earth. the wildebeest move in a giant circle between tanzania and kenya, traveling more than 1,000 miles each year. their movement is not random—scientists have found it is closely connected to rainfall, grass growth, and predator activity.
during the wet season (dec–march), heavy rains grow tall grass that supports large numbers of wildebeest. as the dry season (april–aug) begins, food and water become scarce, and the wildebeest must move. predators like lions and hyenas follow the herds, but they do not start the migration—the shortage of food and water does. when the rains return in sept–nov, the cycle begins again.

1. why do animals migrate?

a. to find better food and water
b. to avoid predators
c. to find suitable climates
d. all of the above

Explanation:

The text states wildebeest migration is linked to rainfall (related to climate), food (grass growth) and water availability, and predators follow the herds. So animals migrate for all these reasons.

Answer:

D. All of the above