A divergent question is one that does not have a definite answer and instead tests one's capacity to think extensively about a topic. Characteristics of divergent questionsIt requires children to analyze, synthesize, evaluate a knowledge base and then predict different outcomes.It encourages children to stretch their thinking beyond what they know to be true. These are also known as open-ended questions. For example- What are the ways to save trees?These questions encourage children to think independently. They are encouraged to use their higher-order cognitive abilities to create new ideas or explanations by combining original and known ideas.Hence, we conclude that "what steps will you take to reduce air pollution in metro cities like Delhi" is a divergent question.Whereas all the other three options are not divergent questions because they all have a definite answer.