You have been asked to prepare a 200-word composition about the Independence Day of Bangladesh that covers its meaning, key historical events, common forms of celebration, and the lessons we should take from it. Address the four parts below in sequence.

a. Write a concise introduction (about 40–50 words) stating the date and overall significance of Independence Day.

b. Describe the main historical events (about 60–70 words) that led to the independence of Bangladesh in 1971.

c. Explain how people commonly observe and celebrate the day (about 50–60 words), mentioning at least three specific activities.

d. Conclude with the lessons and a call to action (about 30–40 words) that highlights how citizens should honor the legacy of 1971.