The peripheral nervous system has two parts: Efferent division and the afferent division.
The afferent division of the nervous system consists of the sense organs and sensory nerves.
The efferent division consists of the motor nerves and the effector organs.
The afferent division is thus, concerned with reception of sensory stimulus and directing the nerve impulse to the mixed nerves.
The efferent division is concerned with receiving the impulse from the mixed nerves and directing it towards the effector organ to produce a suitable response to the stimulus.
I'm assuming that the choices are the ways urban landfills use to increase decay rate for most trash? If so, then the answer would be '<span>increase the number of aerobic bacteria'. Increasing the number of aerobic bacteria increase the decay rate for most trash.</span>
