Answer:
A. Volume
Explanation:
IN two-dimension space we use to calculate area, perimeter but not volume.
In three-dimensional space we also find Volume, Surface area and lateral surface area only.
In volume we find what amount of substance kept inside that container/solid.
Perimeter is the length of total boundary.
Surface area is total area of each face.
And, In Lateral surface area we find the area of each face except bottom and top face.
Thus, "the amount of three-dimensional space inside a solid" is described by VOLUME.