CTET 2 Math and Science 2011 Paper

While teaching the concept, "force can change the shape of an object" to students, a teacher plans the following activities:
a. Explain concepts using commonly observed examples.
b. Provide a dough on a plate and ask the students to press it down with the hand.
c. Show an audio-visual• film explaining the concept with some examples. The teacher is using different approaches to learning because