Question

what feature of higher cns centers reflects human evolutionary advancement?
increased number of spinal interneurons
larger anterior horn of the spinal cord
reduction in reflex arc complexity
expansion of cortical association areas

Explanation:

Cortical association areas integrate information from multiple sensory regions and are involved in higher - order functions like perception, thought, and language. Their expansion is a key evolutionary advancement in the human CNS. Spinal interneurons and the anterior horn of the spinal cord are more related to spinal cord function rather than higher CNS centers. A reduction in reflex arc complexity is not a sign of evolutionary advancement in higher CNS centers.

Answer:

Expansion of cortical association areas