Me guys i'm in a last question (15pts)

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.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.