Final answer:
A tooth with three well-separated and well-developed roots is termed c) trifurcated.
Step-by-step explanation:
The term used to describe a tooth that has three well-separated and well-developed roots is C) Trifurcated.
Each of these roots contains an inner pulp cavity and is covered by cementum in the root area, with dentin lining the inner part. This dental structure is particularly relevant for molars, which are the posterior teeth used for crushing food. The wisdom teeth, or third molars, may also display a trifurcated root structure if they are fully developed and not impacted. Typically, the development of the roots is an indicator of the tooth's ability to function effectively in crushing and grinding food before swallowing.