Concept:Diversity thrives when people express their unique identities within a shared society. Speaking in one’s own mother tongue preserves cultural heritage and fosters mutual respect. Explanation:India is rich in languages, customs, and beliefs. Diversity means accepting and celebrating these differences. Speaking in your mother tongue keeps your language alive and shows pride in your roots. It also helps others understand and appreciate different cultures. Celebrating only your own festivals or staying in your native village does not actively engage with diversity. Travelling in a train may expose you to diversity, but it does not directly complement it. Among the options, speaking in your mother tongue is a daily act that reinforces linguistic diversity and encourages peaceful coexistence. Answer:A. Speaking in own mother tongue