Energy is needed by all living things. So does every living thing on this planet, from bugs to butterflies to baboons. They all need energy to live. From the food we eat.
Food has energy in it.
We also need energy to operate our lights, televisions, cars, and computers. It is the power we need to do work. For millions of years, humans relied on their own muscles to do work. Then, we discovered that wind could propel sailing ships and a flowing river could turn a waterwheel and power our mills. Later, we discovered how to burn wood and coal and make heat and steam.