Identify the compound that plants make to store as energy

Plants store starch which is a complex carbohydrate. This can be broken down into a simple one known as glucose. They then use glucose for energy.

Starch

Explanation:

The compound that the plants make is carbohydrates which is then converted into starch to get stored in the plant body.

Starch is also a form of glucose which is easy to get stored. The process by which the autotrophs make food is photosynthesis.

The end product of this process is glucose which is used by the plants in their various types of metabolic processes.

The leftover glucose is converted into starch and stored in this form only.