Earth orbits Sun
a
Earth orbits Sun in circular path with the same speed because its total angular momentum is unchanged
b
Earth orbits Sun in elliptical path at faster speed when it's near the Sun because its total angular momentum changes
c
Earth orbit Sun in elliptical path at slower speed when it's near the Sun because its total angular momentum is unchanged
d
Earth orbits Sun in elliptical path at faster speed when it's far from the Sun because its total angular momentum is unchanged
e
Earth orbits Sun in elliptical path with same speed because its total angular momentum is unchanged
f
Earth orbits Sun in elliptical path at slower speed when it's far from the Sun because its total angular momentum is unchanged