Ja ka hauj hafubj uaiia gqinaf jayijwbh hahaha
For every 2 people, they would have 1 child. When all the parents die, the population would have 1/2. China had this policy for a while
One example of stimulus is reacting to a hot pan. If you touch it, you immediately pull your fingers back. This is your nervous system sending alerts through your body, and to your muscular system. Your muscular system allows you to bend your arm, and move your fingers away from the hot pan.
:) Hope this helps!