Which of the following is a plant hormone responsible for promoting cell elongation and growth?

Explanation

Gibberellins are plant hormones that make cells grow longer and help plants grow taller. They stimulate stem elongation by making cells stretch in length. Gibberellins also help seeds germinate and flowers develop properly.

These hormones are especially important for plants to break dormancy and start growing in spring. They work by triggering genes that control cell division and expansion. Farmers sometimes spray gibberellins on crops to increase fruit size and crop yield.

Abscisic acid causes dormancy and closes stomata to conserve water during stress. Ethylene promotes fruit ripening and leaf drop. Cytokinins stimulate cell division but do not specifically promote elongation like gibberellins do.