American culture is unique because it is cultivated, formed and developed under certain conditions,which are characteristically American. The major factors contributing to the making of this new nation and the forming of the new culture are the hard environment, ethnic diversity and varied religion,which is quite different from other nations in the world.(1)____________________________________.American family is typically parents and their unmarried children.Middle-aged and elderly people generally do not live with their married children.Many Americans live in mobile homes which are built with wheels.They can be moved.The people in American have a very strong desire to start a new life in a new place.The average American moves fourteen times in his lifetime.The courage to try something new has been an American characteristic ever since their forefathers fought to build up the country.(2)_________________________________________.There are certain freedom which the United States promises to all its citizens and members of minority group,and these rights cannot be denied by a vote of the majority. Americans also like to be involved in many challenging activities and sports to show their adventurous spirits.(3)_____________________________________________.From the facts above, we can see American culture is unique,which was cultivated, formed and developed by the main three factors,rough environment, ethnic diversity and varied religion and still is affected and determined by them now.