Answer: Option(a)
According to Einstein`s Idea,Time and Space are relative.
Step-by-step explanation:
Einstein gave two theories about relativity called as Special Theory and General Theory of Relativity.The term relativity basically tells us the behavior of an event from the observation of different observers.
For example, a person when sitting in a moving car when looks outside, and observes that almost everything outside the car is moving but another person sitting inside car is at rest. It tells us the events depend on an observer. Einstein defined space and time as a single entity called space-time, and it is the fourth dimension of an event.