Answer:
Chemicals from the vents feed bacteria which, in turn, produce sugar and other food for organisms.
Explanation:
"Hydrothermal vents" are cracks or opening in the seafloor. From here, geothermally heated water goes out. These vents allow another way for marine animals to thrive in comparison to the photosynthesis.
Bacteria found in the vent contain no chlorophyll. Instead of using energy from the sunlight, the bacteria uses "hydrogen sulfide" that comes from the vent. Although this chemical is toxic for common animals, it is essential for the bacteria in the hydrothermal vents. It allows them to process their food in order to produce sugar. This process is known as<em> "chemosynthesis." </em>
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One of the answers is 5. Floods Annually.
I have this on a test and its asking for 3 answers. I do not know the other two, but you only asked for one so...
A shortage of food that results in widespread hunger is called famine.
The only disadvantage I could think of would be price of equipment needed to produce energy from the source (i.e. price of solar panels)
