The primary cortex contains a map of the body based not on the size of body parts, but on the complexity and precision of movement in the body parts.

Hello!
The correct answer should be the motor cortex!
Hope this helps! :)

Motor

Explanation:

The primary motor cortex is located in the dorsal part of the frontal lobe.This region is mainly responsible for the planning and execution of the body movements along with other associated areas such as supplementary motor areas, posterior parietal cortex, etc.It is considered as the prime region for controlling the complexity and precision of the movement of the various body parts.