Joshua has learned that the human body is made up of many body systems that work together to function for life which of the following does not provide an example of two human body systems working together A heart pumps oxygen-rich blood from the lungs to the body B storing waste products for later illumination C  shivering in response to sensing cold D hormones are released into the bloodstream

there is none because earth is stationary and flat.

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.