The model illustrates that the Sun’s gravity holds each planet in its orbit. Students in a science class were asked to revise the model to include an explanation of how the effect of the Sun’s gravity on Earth. Which student’s explanation is best?

Student 1: The sun has less gravitational pull on Earth because it is closer.

Student 2: The Sun has less gravitational pull on Neptune because it is bigger.

Student 3: The Sun has less gravitational pull on all planets that are in orbit.

Student 4: The Sun has less gravitational pull on Neptune because it is farther away.