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 help process nutrients, fight disease, and accommodate change.
They help humans overcome the effects of antibiotics.

I think the answer is "They help process nutrients, fight disease, and accommodate change." Am I sure? Nope. (I just passed the question)

Explanation:

the first settlements began along the huang river because of the importance of the huang river in the beginning of china. it goes back to the story, “the tale of emperor yu”, which references the tale of the great flood, which was caused by the huang river and was believed to create and influence china’s making.

earlier philosophers whose work influenced the enlightenment included bacon, descartes, locke, and spinoza. the major figures of the enlightenment included beccaria, diderot, hume, kant, montesquieu, rousseau, adam smith, and voltaire. it spread the ideas of the enlightenment across europe and beyond.