Answer:
Option (A)
Step-by-step explanation:
Hydrothermal vents are the vents that are formed due to the eruptions of the underwater volcanoes. It is the region where the magma coming out to the surface reacts with the seawater. This seawater gets heated and emerges again to form these vents.
Hydrothermal vents are responsible for holding specific types of ecosystems containing various species of organisms within the deep ocean. It balances the chemical composition of ocean and the circulation of essential minerals.
These vents emit black as well as white smokes which are commonly known as black smokers and white smokers respectively.
Thus, the correct answer is Option (A).