How does the spinal cord work with other systems to keep the body heathly (3 examples)

What is one way in which an active listener can confirm understanding of a message?

This anterior tooth has a single root and sharp incisal edges. it has mamelons upon eruptions. this tooth is a a. maxillary central incisor. b. mandibular central incisor. c. mandibular canine. d. maxillary lateral incisor.

First to answer will be the brainliest i need the answer asap