Answer:
A. To plot and time the positions of comets and asteroids
Step-by-step explanation:
Kepler's law helps to understand the orbits of many planets and celestial bodies including comets and asteroids.
It was found that like other bodies or planets, comets also revolve around the sun in an elliptical path.
Consider sun is situated at one foci, when comets revolve around the sun the distance is very large but as soon as it comes closer to sun, it starts to melt thus forming a comet tail.
Hence time and position of a comet is described by Kepler's law.