Question

Which of the following is called as stimulus?

• A. Light
• B. Temperature
• C. Sound
• D. All of the above

Answer 1

The correct option is D All of the above

• The stimulus(singular) is any change in the organism's internal or external environment that causes the organism to react. It is of two types external and internal.
• External stimulus is the stimulus that comes outside of the organism. For example, Light stimulus, heat stimulus, chemical stimulus, sound stimulus, etc.
• The internal stimulus is the stimulus that comes from inside an organism. For example, Hunger, thirst, etc.
• So, the correct answer is 'All of the above'.