Prokaryotic is the answer
The correct answer is abyssal plain.
The ocean basin or the abyssal plain refers to the flat region of the ocean floor. It is enveloped with mud, sand, and animal and plant remain. Situated on this flat plain are underwater mountains known as seamounts, which are produced by volcanic eruptions.
The challenger deep, in the southern terminal of the Mariana Trench is the deepest point in the ocean.
Hydrocarbons,polycyclic aromatic hydrocarbons
u know u can always look it up
but u can also lok up malkovich earth cycle :)