Some what will kill their host, while others won't?\nOptions:\n- (A) barnacles\n- (B) producers\n- (C) scavengers\n- (D) insects\n- (E) cigarettes\n- (F) fungi\n- (G) plants\n- (H) leeches
Let's be accurate as possible. Think before you answer.
(H)
Some parasites kill their host, but most do not.

Leeches are external parasites.

Some leeches will kill their host, but most do not.

.

The final answer: (H)