Here's why:

* Energy storage: Starch is a complex carbohydrate that provides a readily available source of energy for the plant.

* Efficient storage: It's a compact and efficient way to store energy, taking up less space than other forms of carbohydrates.

* Insoluble in water: This prevents it from dissolving in the plant's fluids, keeping it readily available for use.

Where is starch stored?

Starch is primarily stored in:

* Roots: For example, carrots and potatoes are root vegetables that store starch.

* Seeds: Seeds, such as grains (rice, wheat, corn), legumes (beans, peas), and nuts, are rich in starch.

* Stems: Some plants, like sugarcane, store starch in their stems.

Other forms of storage:

While starch is the primary form of food storage, plants can also store energy in other forms:

* Sugars: These are simpler carbohydrates and are often stored in the sap of plants.

* Fats and oils: These are stored in seeds, particularly in plants like sunflowers and soybeans.

Let me know if you have any other questions!