The substances auxins, cytokinins, gibberellins, abscisic acid, and ethylene are all classified as hormones in plants. They play crucial roles in regulating plant growth and development, with each hormone serving specific functions. Together, these hormones ensure that plants can adapt and thrive in their environments. ;
The substances auxins, cytokinins, gibberellins, abscisic acid, and ethylene are classified as hormones in plants. These hormones play critical roles in regulating various aspects of plant growth and development. Therefore, the correct answer is A. Hormones.
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