The tendency to pull other objects toward it is called

""gravity. the force that pulls on objects and causes acceleration if the objects are not balanced by an opposing force. speed. distance traveled per unit time. Newton's Second Law of Motion.""

Explanation:

to be honest as much as i would love to answer this. i feel as if something's missing. just saying.

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue