For energy, a plant breaks apart some of the small sugars it builds. what does the plant do with the rest of its small sugars?

The plant stores them as starch

Explanation:

A typical plant synthesizes sugars from photosynthesis by using water and carbon dioxide.

Parts of the sugar synthesized via photosynthesis is used to generate energy during respiration. The energy generated is useful for other metabolic processes in the plant's body.

The remaining sugar is utilized in the synthesis of starch and stored in the various tissues of the plant.