Various methods of aquaculture can be used to grow species of marine fish. consider the figure below, which shows one way that an aquaculture system can be set up. explain whether this represents an open or closed system and one benefit of using this type of system. this represents a closed system, and one benefit is that all waste is recycled in the system. this represents a closed system, and one benefit is that the risk of passing disease between other species is lower than in an open system. this represents an open system, and one benefit is that it does not release organic waste to cause pollution. this represents an open system, and one benefit is that waste does not accumulate in the system.

The correct statement is that this represents an open system, and one benefit is that waste does not accumulate in the system.

Explanation:

It is the case of open system, and the system where mass possesses the tendency to move in and out of the system is considered as the open system. The mass getting within the system refers to the water, which is supplemented into the tank, and the parting mass is the water, which is produced.  

The main benefit of utilizing the open system is that the water quality can be maintained so that the fishes remain healthy and do not have to thrive in waste, which is the case in the closed system.  

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.