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.

Line is defined as a path through space. In arts, it is the noticeable path created through a point that moves in space. It has only one dimension and differs in its direction, width and length. Usually, it gives meaning to the edges of a form and can be horizontal, vertical, straight or curved, diagonal and even thick and thin.It has diverse character and direction and leads you through the the work of art. Line is one important means of communication information.

B a slowly curving path along a plane

This is what a calorimeter is used for simpler ex, to measure calories in food.

Ireally don’t know