Which reactions are oxidation-reduction reactions? check all that apply
2na+ cl2 → 2nacl
pb(oh)2 -> pbo + h2o
cu + 2agno3 → cu(no3k + 2ag
znbr2 + 2agno, → agbr + zn(no3)2
ch₂ +20₂co₃+h₂o

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.