What is defined as the path of a moving point?

A line is defined as the path of a moving point. In geometric terms, a line extends infinitely in two directions and has no width or thickness; it is made up of an infinite number of points that are co-linear. This notion is fundamental in both geometry and architectural design, as it forms the basis for creating more complex shapes and volumes.

When considering other choices, a point refers to a precise location in space but does not have any dimensions or length. A plane is a flat, two-dimensional surface that extends infinitely in length and width but does not represent the concept of motion or path. Volume encompasses three-dimensional space and is related to the capacity of an object, further deviating from the clear definition of a moving point's trajectory. Therefore, the definition of a line as the path of a moving point is the most accurate choice in this context.