The hormone that causes stomatal closure is:

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(C) The correct answer is $ABA$ (Abscisic Acid). $ABA$ is known as a stress hormone in plants. When applied to leaves,even in minute quantities,it ind

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$ABA$

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(C) The correct answer is $ABA$ (Abscisic Acid). $ABA$ is known as a stress hormone in plants. When applied to leaves,even in minute quantities,it induces the partial closure of stomata. This action significantly reduces the rate of transpiration,thereby helping the plant conserve water during periods of water stress or drought.

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