Answer:
Input.
Explanation:
Input is what's going in, output is what's coming out. Output would be sound.
Answer:reciprocity
Explanation: Reciprocity is a norm amongst people which is due to the act of kindness committed by one person to us ,that result to us feeling encouraged and motivated to commit the act of kindness back to those people , it is a norm of sharing out of the kindness of our heart because people have also been kind to us.
One would cite the 8th Amendment to the Constitution.
The correct answer is letter A.
Explanation: The pressure is the least effective because makes people anxious and did not have a good result.
