What best describes plant hormones?

Plant hormones, also known as phytohormones, are natural chemicals produced by plants that regulate various physiological processes, including growth, development, and responses to environmental stimuli. They play crucial roles in processes such as cell division, elongation, and differentiation, as well as in regulating flowering, fruit ripening, and stress responses. Major types of plant hormones include auxins, gibberellins, cytokinins, abscisic acid, and ethylene, each with specific functions and mechanisms of action. Their balance and interactions are essential for maintaining plant health and adaptability.