What characteristic defines a banana?

The defining characteristic of a banana is its elongated shape and distinct yellow color when ripe. Bananas grow in clusters and are generally longer and curved, making them easy to identify. The yellow color of the peel when mature is also a key feature that distinguishes bananas from other fruits.

In contrast, small red fruits typically refer to berries or cherries and do not match the size and shape of a banana. Round green fruits are typically more associated with other types of fruits such as apples or grapefruits. Citrus fruits are characterized by their tangy flavor and thick peels, which does not apply to bananas, as they belong to the herbaceous family rather than the citrus family.