An onion bulb stores its food in the

Onion bulbs are a type of underground stem that store food for the plant. In this question, you are asked to identify where the food is stored within the onion bulb. The options given are stem, leaves, roots, cotyledon, and branches.

To answer the question correctly, you need to understand the structure of an onion bulb. The onion bulb consists of layers of modified leaves that store food in the form of starch. These modified leaves are known as scales.

Therefore, the correct answer to this question is option B, leaves. The leaves of the onion bulb are modified to store food in the form of starch. This adaptation allows the onion plant to survive during periods of dormancy and to provide nutrients for the growing plant when it resumes growth.

It is important to note that not all plants store their food in the leaves. Some plants store food in their roots, stems, or cotyledons. However, in the case of the onion plant, the food is stored in the modified leaves or scales.

In summary, the onion bulb stores its food in the modified leaves, which are also known as scales. This adaptation allows the plant to survive periods of dormancy and provide nutrients for growth when it resumes.