Question

which sentence uses this meaning of concrete? concrete noun a gray building material made with cement the shelter in the woods behind their house was made from concrete. the empty reservoir is concrete evidence that we are experiencing a serious drought.

Explanation:

To determine which sentence uses "concrete" as a gray building material made with cement, we analyze each option:

• The first sentence: "The shelter in the woods behind their house was made from concrete." Here, "concrete" refers to the building material (noun) as defined.
• The second sentence: "The empty reservoir is concrete evidence..." uses "concrete" as an adjective meaning "specific, tangible" (not the building material).

So the first sentence matches the given definition.

Answer:

The shelter in the woods behind their house was made from concrete.