Question

HELP PLEASE !!!!

Answer 1

Answers are:
-4 for C in CH4, because carbon has greater electronegativity than hydrogen and he attracts shared electrons.
+4 for C in CO2, because carbon has smaller electronegativity than oxygen.
+1 for H in both CH4 and H2O, because hydrogen has amaller electronegativity than both carbon and oxygen. 

Answer 2

It’s the first, second, and fourth options. Hope it helps ^^