Which of the following terms describes all of the nonliving components of an ecosystem

Who led the continental army in the final decisive battle of the revolutionary war at yorktown

Who were the main leaders of the major powers (france, england, and great britain) during the treaty of versailles?

In what is known as the great migration, large numbers of african americans moved from the rural south to northern cities, beginning in the early twentieth century. what motivated this large-scale movement?