Final answer:
The theory of relativity describes the interrelationships between space, time, speed, and gravity.
Step-by-step explanation:
The theory of relativity describes the interrelationships between space, time, speed, and gravity. It was developed by Albert Einstein and it consists of two parts: special relativity and general relativity. Special relativity deals with the behavior of objects moving at high speeds, while general relativity includes the effects of gravity.