Question

descending tracts in the spinal cord relay ________ information.
only motor
sensory and motor
only sensory
only somatic
autonomic

Explanation:

Descending tracts in the spinal cord are responsible for carrying motor commands from the brain to the muscles. They do not relay sensory information (which is the role of ascending tracts). Somatic and autonomic are types of motor functions but the key is that they are only motor. "Sensory and motor" is incorrect as descending is only motor. "Only sensory" is wrong as that's ascending. "Only somatic" and "autonomic" are too narrow - descending tracts cover both somatic and autonomic motor but the over - arching category is motor.

Answer:

only motor