The geographic feature characterized by rolling hills and flat plains is typically referred to as a plains region. This landscape can be found in various parts of the world, often supporting agricultural activities due to its fertile soil. The rolling hills provide gentle variations in elevation, while flat plains offer expansive areas for crops and grazing. Plains regions can be vital ecosystems, nurturing diverse wildlife and plant species. They are often associated with early human settlements, as they provide accessible land for agriculture and habitation, contributing to the development of civilizations.