Answer the following question given this paragraph: 

Giant steps in science may occur if a scientist introduces a major new idea. For example, in 1666, Isaac Newton introduced the idea that gravity is universal. People had long known that things fall to the ground because they are attracted by Earth. But Newton proposed that everything in the universe exerts a force of attraction on everything else. This idea is known as Newton’s law of universal gravitation.


Q: Who proposed that everything in the universe exerts a force of attraction on everything else?

 Choices:

- bell

- einstein

- wilson

- newton

A:
newton
