Specifically depletes populations of commercial fish species, and is a major threat to marine systems from human activities.
a. pollution of wetlands
b. coastal development
c. point-source pollution
d. run-off from non-point sources
e. overfishing

e. overfishing

Explanation:

Overfishing is the term used to describe rampant predatory fishing, that is, commercial fishing done in excess in order to harm the marine environment in a great way.

Overfishing is a major threat to the biodiversity of aquatic environments, because it depletes populations of commercial fish species and is a major threat to marine systems of human activities, because it takes from nature a resource used by many people.

Overfishing is a devastating system that does not take into account the development of species and their ability to replace them, because it does not give fish the ability to reproduce and maintain an adequate level of the fish population.

this is a good question! i'll do some research and come back when i have the answer!