Which action shows responsibility toward the aquatic environment?

There are no choices available however, the following are actions that are geared towards being responsible about the aquatic environment:

a. prevention of garbage, toxic, and other chemical substances from polluting the sea form.
b. by not purchasing aquatic products (i.e.shells, sand, animal meat) to prevent the further destruction of the aquatic environment.
c. by ensuring that policies and regulations on the use of the aquatic environment meet the needs of both those benefitting from it and are inhabiting it.

Gravitational force i believe