What is true of both earthquakes and volcanoes?

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

The buildup of sediments where a river empties into a slow-moving or nonmoving body of water is known as a/an

According to the cell theory, which describes cells? a. all organisms are composed of multiple cells. b. all cells have the same structure and function. c. cells are found in everything on earth. d. living organisms are not created spontaneously