Answer:
The base, it is called a nitrogen base
Explanation:
The answer is The Nervous System.
It interacts with all the other systems, it tells them what to do.
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Answer:
Potential energy is gaining all the way to the top of the hill due to the increase of height (gravitational pull) on the skateboarder. At the top of the hill potential energy will reach its highest point. Then going down kinetic energy increases as potential energy decreases.
Explanation:
