In an experiment, which of the following statements best describes the relationship between the independent and dependent variables? a)the independent variable remains constant while the dependent variable is changing. b)the dependent variable relies upon the independent variable. c)the independent variable is changing and the dependent variable is constant. d)the independent variable relies upon the dependent variable.

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.