Please choose the correct answer to the question: In a series of chemical reactions, X→Y→Z→A, X converts to Y, Y converts to Z, and Z converts to A. Which term describes the process if the production of A interferes with the conversion of X to Y?

Answer1: a complimentary response Answer2: a control system Answer3: negative feedback Answer4: positive feedback

Answer format: answer1/answer2/answer3/answer4