we know that
The altitude of a three-dimensional object is equal to the height of the object, is the perpendicular distance of the base to the other base or the perpendicular distance of the base to the apex of the object
A segment that is perpendicular to the planes containing the two bases
option: c is the correct answer.
A altitude or height (or sometimes called as depth) is defined as a distance measurement usually in the vertical up direction between a reference point and a point or object.
Vertical distance measurements in the "down" direction are commonly referred to as depth.
Hence, height best describes the altitude of a three-dimensional figure.
Hence, option c is the correct answer.