The stress hormone that helps plants to respond to drought is

$ABA$ (Abscisic Acid) is called a stress hormone. From where is this hormone released in leaves?

$I.$ Antagonist to $GA$
$II.$ Promotes bud dormancy
$III.$ Promotes stomatal closure
$IV.$ Promotes abscission layer
Identify the hormone/s which promote/s all these events in plants and choose the correct option.

Abscisic acid treatment results in

$ABA$ (Abscisic acid) is involved in:

Which hormone stimulates the closure of stomata in the epidermis and increases the tolerance of plants to various kinds of stresses?