Which best explains how photosynthesis is to humans?

it reduces the amount of harmful rays released by the sun.
it increases the levels of carbon dioxide in the air.
it provides oxygen for humans to breathe.
it produces proteins, which humans can eat.

It provides oxygen for humans to breathe.

Explanation:

Photosynthesis is the process where plants take in carbon dioxide and leave out oxygen.

c.

Explanation:

because we breathe oxygen. which was carbon dioxide. it transferred to onygen through a plant.

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the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: