Answer:
Earth rotation...is the reason
Answer:
I believe this is a pacemaker. It controls the heart when it starts to fail.
Explanation:
It is true that studies of animals show that they play only when the physical survival needs have been met; however, there is growing evidence that for children, play is crucial in terms of biological evolution as well as individual development.
In "Hydroelectricity" we build dam in order to produce electrical energy by rotating our huge turbines. As Dam separates the division of water into two parts, It can store/prevent flooding and protect community
In short, Your Answer would be "Hydroelectric Power"
Hope this helps!
