Answer the following question: Answer the following question given this paragraph:   Neurons are usually classified based on the role they play in the body. Two main types of neurons are sensory neurons and motor neurons.   Q: What do you call the zone in a body of water where there is too little sunlight for photosynthesis?   A:

Possible answers:
 + semimetal zone
 + Dark Zone
 + observable zone
 + aphotic zone
Answer:
aphotic zone