Explanation : 'Need' word is also often used for motivation. We may define motivation as a need, want, interest or desire that propels someone in a certain direction. This motivating mechanism can be called many things a habit, a belief, a desire, an instinct, a need etc but no matter what its label, it is this motivation that prompts us to take action.
Explanation : Concept formation is an inductive teaching strategy that helps students to form a clean understanding of a concept through studying a small set of examples of the concept. Given options help the student to develop concepts.