Question

Why should a person who sells fish and fish aquaria learn about the excretory systems in animals?

Answer 1

The correct answer is "So that they can maintain the salinity of their aquaria or aquarium to keep their aquatic animals healthy".

Salinity is referred to as the measurement of all of the salts dissolved in bodies of water, such as oceans, lakes or rivers. Salinity is generally measured in elements which is keeping within thousands place.