<span>D. must rely on other means than photosynthesis.
</span>Because sunlight is inadequate at the bottom of the sea, photosynthesis cannot take place. There are no plants and food is scarce; usually decaying matter from dead organisms. Organisms in the bottom of the sea relies on chemicals from hydrothermal vents to create their own food through chemosynthesis.
Answer:
answer is the ability to do work
I think water is indeed an inexhaustible resource. We can keep using it, but it will always come back as rain, snow, ice etc. Water energy sources are one of the biggest renewable energy sources in the world.