Fact 1: Organisms cluster around hydrothermal vents in the ocean floor. Fact 2: To survive, some organisms living near hydrothermal vents have formed close associations. Given the two facts above, how is survival ensured around hydrothermal vents?

Select from:
(A). heat produced.
(B). Eating a lot.
(C). Reproducing quickly.
(D). biological diversity.
(E). vegetation.
(F). Being in a cluster.
(G). Staying far apart.
(H). hydrate their cells.
The answer is:
(F).