Coordination tells a reader that two or more ideas are incorrect two or more ideas have the same structure two or more ideas are equally important two or more ideas are unnecessary

The answer to the question stated above is the third option which is:two or more ideas are equally important.

Coordination is defined as a grammatical connection of two or more words, phrases, or clauses  to give them equal emphasis and importance.

Coordination tells a reader that two or more ideas are equally important. In the English language, coordination means grouping together words, phrases, and ideas using coordinating conjunctions such as for, and, nor, but, or, yet, and so. By combining 2 or more ideas, you avoid repetitiveness, and create a good flow of thoughts.