At our March Home School 4-H Group, we learned about plants and gardening. Dirt is really misplaced soil. If you touch the ground, the soil that sticks to your hand is dirt. It keeps them from drying out. The sun provides food through the process of photosynthesis.
Photosynthesis gives a plant energy.
The energy makes food for the plant so it will grow. Light is not only helpful, it is essential. Plants also need the warmth of the sun. Although, if it is too hot, most plants will dry up and wither unless you keep them well watered. If it is too cold, certain plants will freeze and die.