The energy from the sun is known as solar energy. Solar energy is helpful to the plant, but not in that stage so what the plant does is to convert it to chemical energy so that the plant can get a better use of it.
Further info: primary consumers also convert the chemical energy obtained fron eating plants into another form called kinetic energy, which is also known as the energy of movement. But since plants don't move, they don't do the transformation.
After plants absorb energy from the Sun, the energy gets converted into chemical energy for the plant to carry out life activities. Chemical energy is used up by the different processes within the plant cells (e.g. cellular respiration, photosynthesis).
Stomata are tiny holes found in the underside of leaves. They control water loss and gas exchange by opening and closing. They allow water vapour and oxygen out of the leaf and carbon dioxide into the leaf.
