Question

Question 3 (e)

Fill up the blank.
Changes in our surroundings that make us respond to them, are called ___.

Answer 1

Changes in our surroundings that make us respond to them are called stimuli.

Every living thing responds to stimuli. For example, a cockroach running away from light. Here light is the stimulus. In some plants like Mimosa plant, commonly known as ‘touch-me-not’ plant, close their leaves when touched. Here touch is the stimulus.