Citing Textual Evidence

How do I properly cite textual evidence?

What suffix would u fond in the word indicate related to

Which best summarizes what scientists learned about how microbes benefit the human body? they are part of a normal human ecosystem. they have become less harmful to humans than they used to be. they process nutrients, fight disease, and accommodate change. they humans overcome the effects of antibiotics.`

Why does yu tsun kill dr. albert at the end of borges’s “the garden of forking paths”?