The role of phytohormones in plant growth regulation is essential for coordinating development and responses to environmental stimuli. These hormones, including auxins, gibberellins, and cytokinins, regulate processes such as cell division, elongation, and differentiation. For example, auxins promote stem elongation and root formation, while gibberellins influence seed germination. By modulating these growth processes, phytohormones enable plants to adapt to changing conditions, ensuring survival and optimal growth throughout their life cycle.