Answer: Option (a) is the correct answer.
Step-by-step explanation:
Work is defined as the amount of energy or force required to move an object from its initial position.
For example, a person applies 10 N of force in order to move a wooden box from point A to point B.
This means that the man has done some work in order to move the wooden box.
Mathematically, Work = Force × Distance
Thus, we can conclude that out of the given options, work = force × distance is the correct equation for calculating work.