<span>The correct answer is D. a viral infection. Viruses are immune to antibiotics and and can't be killed easily, so you treat the symptoms and the body establishes immunity and defeats the weakened virus. That's why once you get things like the measles once, you can never get them again after in your life.</span>
What is the I have no idea
Both help the passage of molecules down their concentration gradient.
Both don't require energy to function
True you want to stay in shape
