___________culverts have a concrete (sometimes other materials can be used too) floor allowing the water to flow smoothly through it.
A)box
B)cylindrical
C)narrow
D)long

Question

Quizplus · Accepted Answer

Box culverts have a concrete floor that allows water to flow smoothly through them. They are distinguished by their rectangular or square shape, providing a flat bottom surface.

___________Culverts Have a Concrete (Sometimes Other Materials Can Be Used