Abscisic Acid (ABA) is a plant hormone that plays a crucial role in regulating various plant processes. It helps plants respond to stress, such as drought or extreme temperatures, by closing their stomata, which are tiny openings on leaves. This action reduces water loss and helps the plant conserve moisture, making ABA essential for survival in challenging environments. In addition to its role in stress response, ABA also influences seed development and dormancy. It signals seeds to remain inactive until conditions are favorable for germination, ensuring that plants can thrive when the time is right. Overall, ABA is vital for maintaining plant health and resilience.