Answer:
Option c). both a) and b)
Step-by-step explanation:
The main and basic function of the feedback loop in a system is provide accuracy and reduce error in the system as it checks and reports the system with the help of the feedback system it has.
The feedback loop in a system or plant performs the major functions of controlling, actuating and sensing thus producing accurate system response and lesser chances of error.
The feedback system effects the plant as it helps to control the transient response of a system and also results in the reduction in sensitivity of the system to the variations in parameters of the plant.