instruction:
Given a scientific question, generate a correct answer to it.
question:
What term is used to describe birds that hunt, eat mammals, and other birds?
answer:
raptors

question:
What is the term for a loop in which a product feeds back to control its own production?
answer:
feedback mechanism

question:
What involves the emission of a particle and/or energy as one atom changes into another?
answer:
radioactive decay