Explain how water can be an abiotic environmental factor when it is essential to all life on earth.

Water itself does not live. Water does not need sustenance of any sort to continue to function and it does not pass on any sort of DNA to any build a future generation so it is not biotic.

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.

Compound light microscope