The answer is <u>B: a mutation inhibiting human immunodeficiency virus from entering the host cell</u>
The concept is gene enviornment correlation.
hope it helps u.............
The category of organisms in a water ecosystem that includes the larger active swimmers is called Nekton. There are three classification of aquatic organisms that can be classified according to their location or habitat. One of them is Nekton which includes the larger swimmers in water ecosystem and the other two are Plankton and Benthos. Nekton are mostly fish or other living things that swim through the water.
