Which of the following is a reduction half-reaction? A. 2Cl + 2e + Cl2
B. C12() + Cl2(S)
C. 201* + 2e + Cl2
D. Cl2 + 2Cl + 2e

Well to my expert knowledge and my exquisite calculations i think the the negative ion # 412 is the key to sucess

C: plants and animals

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf