An adaptation of the Catechism for Young Children in modern English.
Question: What duty does the second commandment teach us?
Answer: To worship God correctly, and to avoid idolatry.
Question: What does the second commandment teach us?
Answer: To worship God in a proper manner, and to avoid idolatry.
Supplies the word ‘duty’ to continue the sectional theme. Additionally the phrase ‘proper manner’ is simplified to ‘correctly’.