Plants don't move around, so why do they need energy?

Plants need energy so they could transport water and minerals up through the plant

Plants need energy to grow, that energy comes from the sun. Such as Thermal energy, and light energy. Plants need all this so that they can do photosynthesis as well. Later on when an animal grazes, that 10% of it's energy gets transferred to that animal, whether it's a cow, horse, mouse, shrew etc. The food chain goes on and that energy is transferred throughout it.  Basically everything needs energy to grow.

The answer is a because - is an direction