work of raising crops and farm animals

an area of land that has its own unique landforms, climate, and culture

a group of people or nations under one government or leader

an artificial channel for moving water

man-made way of supplying water to land areas

a strict social standing; nobles, commoners, and slaves

a storekeeper; someone who buys and sells goods or services

a person moving from place to place

the interaction of all living and non-living things in an area