Answer:
??
Explanation:
what's the actual question
Answer:
When you are running the most important force that you should understand is friction. Friction is a force that opposes movement between two objects, but for runners friction makes you faster. Friction gives you a better and more efficient way to use your energy into speed.
the more pressure put on the string, the more frequency and higher pitch.
Please mark brainliest you answer is B).
Have a good night!
