When a single cell organism splits in too
I believe the answer is D, Cells get energy by taking in nutrients from food. Correct me if I'm wrong.
They have to have a higher density than water to have the ability to stay on the sea floor. Otherwise they would just float to the surface of the water
One negative impact of building a dam could be that it affects natural habitats of animals who live in and around the river. When you build a dam, the river's height becomes smaller because a huge amount of water becomes technically removed or blocked. This can affect animals such as fish or beavers or anyone who needs that water.
The Egrets seem to prefer insects because they ate 66 of them, and 66 was the most visited as well.