How do you do this problem ?

Question

Nonmetallic mineral resources frequently used in construction are

salt and gypsum.
sulfur and talc.
sand and gravel.
graphite and nitrate.

Answer 1

Sand and gravel. There is no trick of chemistry to solving this problem, it is simply a problem of observation and attention. None of the options are metallic, so that does not help us narrow down the search. You must then analyze the materials by experience. What have you seen used in construction? Salt? No. Sulfur? No. Nitrate? No. Sand? Yes. Gravel? Yes. How is it used? In concrete!

There you have it.

Answer 2

sand and gravel make concrete