CTET Class I to V 22 Dec 2021 Paper

While planning to teach ' Pollution' in her next class, Nivedita found that students from rural backgrounds have not heard of the term "Pollution" and hence will have difficulty understanding it. Which method should Nivedita use to introduce this concept?
(A) Lecture
(B) Brain Storming
(C) Playthrough Puppets
(D) Field visit