Answer:
The correct answer will be option-A
Step-by-step explanation:
A scientific theory is a statement which explains the natural phenomenon and events in-depth.
The scientific theory explains how and why the process is taking place which is based on the accumulation of multiple hypotheses and the experiments performed to test the hypothesis.
In the given question, an option which asks how the gravity works in nature can be explained in the theory and thus option-A is the correct answer.