Gravity's Role in Making Stars. When a clump of interstellar gas and dust is small and dense enough, gravity plays a decisive role in turning that material into a new star.
Correlation- a measure of association between two variable.
C, details that help readers visualize the settings better. A wouldn't work because it doesn't help the setting, B doesn't help the setting either and D would only add more confusion so UT would have to be C by process of elimination.
