What is the purpose of stipules in plants?

Stipules are small leaf-like structures that are typically found at the base of leaf stalks (petioles) in many plants. The primary purpose of stipules is to assist in the attachment of the leaf to the stem, providing support and stability. This attachment is crucial for the proper functioning of the plant as it ensures that leaves are positioned optimally to capture sunlight for photosynthesis. Additionally, stipules can sometimes play a role in protecting the developing leaves or buds, but their main function is fundamentally linked to the structural connection between leaves and stems. Other options like flower protection, root growth, and seed dispersal do not relate to the specific function of stipules and are fulfilled by other plant structures or mechanisms.