Final answer:
Paul instructs the Colossians to sing worship songs in church for various reasons, including teaching one another, expressing joy and gratitude, and proclaiming the Gospel, edifying believers, and glorifying God.
Step-by-step explanation:
Paul instructs the Colossians that we are supposed to sing worship songs in church in order to A) Teach, admonish, and encourage one another, B) Express joy, gratitude, and praise, and D) Proclaim the Gospel, edify believers, and glorify God. Singing worship songs serves multiple purposes in church, including teaching and admonishing one another, expressing joy and gratitude, and proclaiming the Gospel, edifying believers, and glorifying God.