Question

What does infrastructure mean?

A. the fundamental facilities and systems that serve an area
B. the internal parts that hold a building together
C. ranking structure of the military and the agencies supporting it
D. rules and polices that govern the people of the United States

Answer 1

Generally speaking, infrastructure means "A. the fundamental facilities and systems that serve an area," although if you're referring strictly to construction, then it would be the beams, foundation, etc.