Intrinsic vs extrinsic feedback: which statement is correct?

• A. Intrinsic feedback arises from planned control actions; extrinsic feedback arises from automatic physical responses.
• B. Intrinsic feedback arises from automatic physical responses (temperature, density changes); extrinsic feedback arises from planned control actions or external devices.
• C. Intrinsic feedback is the same as extrinsic feedback.
• D. Feedback mechanisms do not affect reactor kinetics.

Answer: (B)