Which two body systems work together to transport oxygen to the cells?

respiratory and circulatory

Rhea is a moon of Saturn. Which of these facts about Rhea best indicates that it does not have a water cycle in which water changes state?

Its temperature is between -174C and -220C.

Ten people became sick with the flu after attending a school dance. What is the scenario that could best explain how the people got sick?
contact with an infected person