An object having a capability to do work is said to possess energy.

Explanation:
- Energy is defined as the ability to do work. When an object possesses energy, it has the potential to exert a force and cause a physical change or perform a task.
- Energy exists in various forms such as mechanical, thermal, chemical, electrical, and so on. Each form of energy can be converted into another form.
- The energy possessed by an object can be transferred to another object or transformed into a different form. This transfer or transformation of energy is what enables work to be done.
- Work is defined as the transfer of energy from one object to another, resulting in a physical change or the performance of a task.
- When an object does work, it loses some of its energy. This can be observed in various situations. For example, when a moving car applies brakes, its kinetic energy is transferred to the brakes in the form of heat energy, causing the car to slow down and eventually stop.
- On the other hand, the object on which the work is done gains energy. This can also be seen in everyday examples. For instance, when a ball is lifted against the force of gravity, work is done on the ball and it gains gravitational potential energy.
- Therefore, the assertion that an object having the capability to do work possesses energy is correct. Objects with energy can exert forces, cause changes, and perform tasks.
- Energy is a fundamental concept in physics and plays a crucial role in understanding and explaining various phenomena in the universe. It is essential for the functioning of machines, the generation of electricity, the growth and development of living organisms, and many other aspects of our daily lives.