Learning by doing exercises or playing games; commonly used in schools.
Answer:
Blue Screen's
Explanation:
Looking at the Tv to long can change ur brain physically and mentally.
And Could change ur eyesight.
When u play games it gives off Harmons when ur doing drugs
And u get stressed without knowing it
By components do you mean organs? If so...
1. Brain - gives demands ands orders to all of the body to function properly
2. Heart - pumps blood, and keeps the organism receiving the blood alive
3. Skin - protects the tissue from UV Rays that may be harmful