. Abscisic acid controls

Best Answer

Explanation : 

• Abscisic acid is a sesquiterpene plant hormone that is moderately acidic.
• It serves as an inhibitor because it counteracts auxin, cytokinin, and gibberellin's growth-promoting effects while promoting seed development, maturity, and dormancy.
• Abscisic acid, which accumulates in latent buds, seeds, and other storage organs, regulates dormancy.

These organs will remain inactive until abscisic acid is destroyed or growth-promoting chemicals, particularly gibberellin, overcome them.

• Abscisic acid also regulates abscission or the separation of plant parts; it induces abscission of leaves, fruits, and flowers.
• So, the right answer is dormancy and leaf fall.

Final Answer :

Option B : Leaf fall and dormancy