The energy transformation a plant uses from the sun is called photosynthesis.

Here's how it works:

* Light energy from the sun is absorbed by chlorophyll, a green pigment in the plant's leaves.

* This light energy is used to convert carbon dioxide from the air and water from the soil into glucose (a type of sugar).

* This process also releases oxygen as a byproduct.

So, the energy transformation is:

Light energy → Chemical energy (glucose)

This glucose is the plant's source of energy, allowing it to grow, reproduce, and carry out other life processes.