A Large Population of Yellow Perch and Walleye in the East River

The Movement of Walleye to a New River

A large population of Yellow Perch lives in the East river. The Walleye is a larger fish that eats the Yellow Perch. Despite lots of prey, all the Walleye have moved from the East river to a new river.

What most likely caused the Walleye to move to a different river?

There is pollution in the East river that the Yellow Perch are adapted to but the Walleye are not.

Answer:

D

Explanation:

There is pollution in the East river. According to the information given, the Walleye moved to a new river even though there is an abundance of prey like Yellow Perch in the East river. The pollution in the East river may have caused the Walleye to move as the Yellow Perch adapted to it but the Walleye could not.