Question

boyles law explains
the way to develop an idea and design an experiment.
the impact of gravity on the motion of objects on earth.
the relationship between pressure and the volume of gas.
the elliptical orbit of earth and other planets around the sun.

Explanation:

Boyle's law is a principle in physics (a subfield of Natural Science) that states that for a fixed amount of gas at a constant temperature, the pressure and volume of the gas are inversely proportional. So it explains the relationship between pressure and the volume of gas. The other options describe different concepts: developing experiments, gravity's impact on motion, and planetary orbits, which are not related to Boyle's law.

Answer:

the relationship between pressure and the volume of gas.