what was isaac newton responsible for discovering?\nthe idea of the printing press\nthat the earth was…

what was isaac newton responsible for discovering?\nthe idea of the printing press\nthat the earth was round\nthe theory of relativity\nthe theory of universal gravitation
Answer
Brief Explanations:
Isaac Newton formulated the theory of universal gravitation. The theory of relativity was by Albert Einstein. The idea of the earth being round predates Newton. The printing - press was an invention not related to Newton's discoveries.
Answer:
The theory of universal gravitation