Laws of planetary motion include that each planet travels in an elliptical orbit around the sun, and that an imaginary line from the sun to any planet sweeps equal areas in equal time intervals. a. newton’s c. galileo’s b. kepler’s d. copernicus’

b. Kepler’s

Explanation:

Kepler’s law is related to areal velocity. It states that any planet which is revolving around the sun sweeps an equal area in equal intervals of time i.e. areal velocity of these planets is constant. He also stated that sun is the focus of all the planets revolving around it and they move in elliptical orbits around it.

This law does not consider gravitational interactions which exist among various planets which revolve around the sun.

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers