A planet moving in an elliptical orbit moves1) slower when it is closer to the Sun.2) faster when it is farther away from the Sun.3) slower when it is farther away from the Sun.4) faster when it is closer to the Sun.5) both c and d.
According to Keplers second Law, the closer the planet is to the sun, the stronger the sun's gravitational pull on it, and the faster the planet moves.
