Why is it helpful to identify
relationships between species?

if u cant identify a species, you might make a mistake if your near one, or if your near a look-alike. it can be dangerous to have a false description, or if you don't have a description at all. if you see a python, and think its a normal garden snake, or something, you could die because of a cheap mistake

Explanation:

it would lead to upper respiratory infections and pneumonia.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.