From a perspective, mental illnesses constitute a social problem because they challenge our ability to provide effective treatment.

24-karat gold is considered to be pure gold. 18-karat gold is considered to be about 75% gold. what is 18-karat gold considered a mixture rather than a pure substance? a) it has a variable composition of other elements and minerals. b) its color is different than pure gold. c) the gold atoms are not arranged in a repeating pattern. d) it can be melted and transformed into a different substance.

Interest groups and political action committees are both types of organizations that

Humans are the only animals capable of communication