The correct sentence is B : They haven't found anyone to help with the decorations.
All of the other sentences have double negatives. For instance, in A: never and nobody are both negatives. The correct sentence should be: The large man would never hurt anybody.
C: didn't and nothing. Sharon insists she didn't know anything about her surprise party.
D: hasn't and none. Lance hasn't started any of his homework so far.
The most common categories of natural resources are minerals (such as gold and tin) and energy resources (such as coal and oil). The air, forests and oceans can also be classified as natural resources.