Answer the following question given this paragraph: 

All living things need energy. They need it to power the processes of life. For example, it takes energy to grow. It also takes energy to produce offspring. In fact, it takes energy just to stay alive. Remember that energy can’t be created or destroyed. It can only change form. Energy changes form as it moves through ecosystems.


Q: Energy cannot be created or destroyed - it can only change what?

 Choices:

- kind

- fluid

- shape

- form

A:
form
