Which one of the following is not one of the sources of dissolved salts in seawater
sea shells, fish scales, and other animal materials

Other animal Materials

Explanation:

As we know that animal materiel is composed of carbohydrates, lipids and proteins therefore there is no salts present in it as like sea shells and fish scales. Both of these have salts of calcium in the form of calcium carbonate. Therefore, we can say that animal material is not the source of salts in sea water.

answer: a. a gene that causes a specific trait.

i think that c)gold was found there

but i am not sure