Fact 1: Viruses cannot reproduce by themselves. Fact 2: Viruses are germs that cause people to get sick. Given the two facts above, germs that cause people to get sick cannot reproduce by what?
Pick your answer from: 1. anemia 2. dry conditions 3. harm them 4. contamination 5. burning coal 6. Smoking 7. heat or cold 8. themselves
8.