Aline is an undefined term because it
a. contains an infinite number of points
b. can be used to create other geometric shapes
c. describes something that does not have width or depth
d. is a term that does not have a formal definition

Option C) describes something that does not have width or depth      

Step-by-step explanation:

We are given the following information in the question:

We may define line as:

A line is a straight one-dimensional figure having no thickness and extending infinitely in both directions. A line is sometimes called a straight line. It is demonstrated by arrow on both sides showing that it can be extended on both sides.A line can be considered undefined term because it tells us about something that does not have width or depth. A lines can  extend its length in both side infinitely. It contains arrowheads indicating it can extend.

Thus, the correct option is Option C) describes something that does not have width or depth.

Heptagon is the correct ans