How does eye location best represent the relationship between structure and

A location of a eye can be a structural adaptation among organisms. The eye location can help organisms to perform different functions in an ecosystem. There are two types of eye locations : monocular and binocular. The eye location affects the vision characteristics of living organisms hence, directly affects functions like searching of food and shelter, capturing of prey, protection against predator and other important ecological functions. Monocular eye location promotes monoclonal vision, the eyes are present on the sides of the head provides wider field view. This provides less depth perception because of wider field observation. Binocular eye location promotes binocular vision, the eyes are located on front of the head of the organism provides higher accuracy and depth perceptions. Monocular eyes are found in some herbivores, allow them to see predators from both sides of their head and hence, prevent them from being caught by predators. Binocular eyes are present in some  carnivores, allows them to observe and hunt prey.  

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.