Given below are two statements: one is labeled Assertion (A) and other is labeled Reason (R).

Assertion (A): Animals can react to stimuli in different ways.

Reason (R): Animals have nervous system and an endocrine system involving hormones.

In the light of above statements, choose the correct answer from the options given below.

Both (A) and (R) are true, and (R) is the correct explanation for (A).

Assertion (A) is true because animals indeed have the ability to react to various stimuli, such as changes in their environment or internal conditions.

Reason (R) is also true because animals possess both a nervous system and an endocrine system. The nervous system allows for rapid and specific responses to stimuli, while the endocrine system regulates responses over longer periods through the release of hormones. The presence of these systems enables animals to react to stimuli in different ways, with the nervous system handling immediate responses and the endocrine system playing a role in longer-term adjustments.