Which of the following organisms have the greatest effect on an ecosystem because of the changes they make to their environment?
bees building a hive in a hollow tree wasps building a nest in a leafy bush beavers building a dam across a stream fish digging a burrow on a river bottom
Question: Which of the following organisms have the greatest effect on an ecosystem because of the changes they make to their environment?
A. bees building a hive in a hollow tree
B. wasps building a nest in a leafy bush
C. beavers building a dam across a stream
D. fish digging a burrow on a river bottom
Answer: