Answer: Complexity
Explanation: The nervous system is an essential and integral part of an individual or animal which aids the receipt and transmission of sensory information from and to other parts of the body. In the scenario above, the complex nature of the nervous system which enables it to codify more than one sensory information at a time is highlighted, It receives and peocesses different sensory signals simultaneously, transmitting received signals or stimulus to the brain to act on. The complexity of the nervous is demonstrated in Ashley's ability to talk on phone, type on a computer and hand documents to colleagues simultaneously.