22h Make the verb agree with its subject, not with a subject complement.

One basic sentence pattern in English consists of a subject, a linking verb, and a subject complement: Jack is a lawyer. Because the subject complement (lawyer) names or describes the subject (Jack), it is sometimes mistaken for the subject.

The example reads,

A major force in today’s economy (strikethrough) are (end strikethrough) (insert) is (end insert) children (m dash) as consumers, decision makers, and trend spotters.

Text below reads, (Italics) Force (End Italics) is the subject, not (Italics) children (End Italics). If the corrected version seems too awkward, make (Italics) children (End Italics) the subject: (Italics) Children are a major force in today’s economy (m dash) as consumers, decision makers, and trend spotters (End Italics).