Line is defined as a

a.
a geometric shape that is open and moves from one point to another.
b.
a slowly curving path along a plane.
c.
a path through space.
d.
the distance or area between, around, above, below, and within objects.

The answer is C a path through space

Explanation:

A line is defined as a path through space

The answer is not A because a geometric shape can either be of any shape whether spherical or circular

The answer is not B because a line which said to be slowly curving path line is not a curving path

The answer is not D because a line cannot be the distance or area between, around, above, below and within objects.