Concept:EVS teaching is most effective when linked to children's daily life and home experiences. The teacher aims to build on their existing knowledge and encourage reflection.Explanation:The teacher asks students about how clothes are washed to connect the topic to their real-life observations. This encourages them to reflect on their home experiences, supporting option B. The varied methods shared—beating on a stone, using a brush, or a washing machine—provide a diverse context for learning, supporting option C. Also, discussing these methods helps teach the process of cleaning clothes, which is practical knowledge, supporting option D. Social disparity is not highlighted here; the discussion does not compare students’ backgrounds, so option A is incorrect.Answer:B. B, C & D