OPT: A). loose soil; B). animals; C). with their fur; D). In the blood; E). Behind teeth; F). On the surface; G). In the mouth; H). an organism's body;
Given those answer options, answer the question: Fact 1: Some parasites live on the surface of their host. Fact 2: Ticks are blood sucking parasites that attach to the skin. Given the two facts above, where do ticks live?
A:
F).