Answer: Feedback
Explanation: Feedback is the reaction obtained in the form of information from the task a person has performed or any product. It gives the review of the service that is given by the customer, user etc.The reaction that is obtained can be a negative feedback or positive feedback.
Both types of feedback is necessary because it helps in the improvement of the service. The negative reaction will helps to change/improve the service that is not liked by the customer and positive feedback tells about the services appreciated by the customer. So, Shelby is also keeping the feedbacks for the same purpose for her salon business.
Solid-state component in a mobile phone maintains proper voltage levels in the circuits C. diodes
Electronic devices called capacitors store electric charge. They allow a mobile phone to store data such as phone numbers, even if the battery is removed for a short time. Diodes maintain proper voltage levels in the circuits.
Diodes can be used as rectifiers, signal limiters, voltage regulators, switches, signal modulators, signal mixers, signal demodulators, and oscillators. The fundamental property of a diode is its tendency to conduct electric current in only one direction.
To learn more about Diodes, refer
#SPJ2
B. Forums
C. Podcasts
D. Social networks