A. American independence and democracy
Bangladesh is the country of South Asia which is at the lowest elevation that is shown on the map. Bangladesh is one of the Country in South Asia which is marked by greenery and many waterways, it is located tot he east India on the Bay of Bengal. The capital of this country is Dhaka.
Another way your question could be framed is “why do nations use imperialism on weaker countries?” and the simple answer is there are several motives such as ethnocentric purposes, religion, access to natural resources, expanding power, etc. Specifically people resort to imperialism on weaker countries because they are vulnerable to accept whatever helps the people survive in times of unrest.