Answer the following question given this paragraph: The aphotic zone is water deeper than 200 meters. This is where too little sunlight penetrates for photosynthesis to occur. As a result, food must be made by chemosynthesis or else drift down from the water above. Q: What is the minimum depth in the aphotic zone? A:

OPT:
[1]. 150 meters;
[2]. 450 meters;
[3]. 10 meters;
[4]. 200 meters;
Answer:
[4].