EVERYDAY SCIENCE

Detailed explanation-1: -The nervous system allows an organism to respond quickly to changes in the internal or external environment.

Detailed explanation-2: -The nervous system helps all the parts of the body to communicate with each other. It also reacts to changes both outside and inside the body.

Detailed explanation-3: -Through its receptors, the nervous system keeps us in touch with our environment, both external and internal. Like other systems in the body, the nervous system is composed of organs, principally the brain, spinal cord, nerves, and ganglia.

Detailed explanation-4: -The nervous system takes in information through our senses, processes the information and triggers reactions, such as making your muscles move or causing you to feel pain. For example, if you touch a hot plate, you reflexively pull back your hand and your nerves simultaneously send pain signals to your brain.

Detailed explanation-5: -The ability of an organism to respond to external stimuli is called sensitivity. For example, Plants grow towards light(external stimuli) sources, and if the direction of light is changed, the plant will also change its direction of growth to accommodate for survival. So, the correct answer is ‘Sensitivity’.