You are presented with the quiz "what do some parasites do to their hosts?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "some parasites kill their host, but most do not" and "killing means death". So, what's the best answer to the question?

pick from the following.
A). Move to another area
B). harm them
C). leeches
D). Damages them
E). impregnate
F). cause their death
G). They may not survive.
H). ticks
Answer:
F).