The alternating rising and falling of the sea caused by the gravitational pull of the moon is called?​

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.

Nuclear decay is the spontaneous decay of one element into a. an x-ray b. a ray of light c. another element

Which of these is a density dependent factor? a. epidemic b. earthquake c. drought d. hurricane