Question

volume is the...
total units that cover a flat shape.
area on the outside of a solid container.
distance around the edge of a flat shape.
amount of space inside a solid container.

Explanation:

Volume refers to the space occupied within a three - dimensional object (like a solid container). The first option describes area (for a flat shape), the second describes surface area (outside of a solid), and the third describes perimeter (distance around a flat shape).

Answer:

amount of space inside a solid container.