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 fundamental gas law that states for a fixed amount of gas at constant temperature, the pressure and volume are inversely proportional, mathematically expressed as $P_1V_1 = P_2V_2$. The other options describe unrelated concepts: experimental design, gravitational motion, and planetary orbits.

Answer:

the relationship between pressure and the volume of gas.