Final answer:
Life at the bottom of the ocean is sparse due to a lack of light, extreme pressure, and cold temperatures.
Step-by-step explanation:
Life at the bottom of the ocean is sparse due to a combination of factors. First, there is no light at such depths, making photosynthesis impossible. This means that primary production, the base of the food chain, is limited. Second, the pressure is extreme at the bottom, which can crush organisms not adapted to survive in such conditions. Lastly, the temperature is exceedingly cold, making it difficult for many organisms to survive.
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