Household. limit number of children family can have
<span>In China in the 1980s, commune-based agriculture was replaced by the household responsibility system.</span>
<span>Involuntary, automatic, innate responses to stimuli are called reflex behaviors.
</span> When the body or part of the body makes involuntary and nearly instantaneous movement in response to a stimulus then that is a reflex. The reflex does not receive or need conscious thought. It is an automatic response to a stimulus.
.............................
The correct answer is D. a doctor
Trephination is just a surgical maneuver and it was performed by doctors since a farmer or a lawyer are not usually skilled enough to drill someone holes in someone's head.