What type of plastid is responsible for storing starch?

Amyloplasts are specialized plastids that have a primary function of storing starch. These organelles are typically found in non-photosynthetic tissues of plants, such as tubers and seeds, where they accumulate starch granules. Starch serves as an energy reserve for the plant and is vital for its growth and development.

In the context of the other options, chromoplasts contain pigments that give color to fruits and flowers, playing a role in attracting pollinators and seed dispersers, rather than storing starch. Chloroplasts are responsible for photosynthesis, converting light energy into chemical energy in the form of glucose, but they are not primarily involved in starch storage. Leucoplasts can store various substances and are involved in the synthesis of lipids and proteins, along with some roles in storage; however, they do not specifically store starch like amyloplasts do.

The specific function of amyloplasts in starch storage distinguishes them as the correct answer for the question.