Which factors make studying hadal zone ecosystems difficult?

The lack of natural light, the temperature, and the high levels of hydrostatic pressure.

Explanation:

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science-ocean floors and habitats study guide by volleyballqueen3817 a major advance in ocean-floor mapping. list four sections of the ocean floor. algae that use sunlight to produce their own food through photosynthesis. all of the feeding relationships that exist in a habitat. drying out, predators, find food.

answer: blah

explanation:

bc blah