Behind the trachea is the esophagus, the tube that brings food from the throat to the stomach. How is its appearance different from the trachea?

Air pollution is only caused by human activity, select the best answer from the choices provided ot of true or false

Chalk is an ionic compound. which is a property of all ionic compounds that makes chalkboard? particularly useful for writing on a a high melting point hardness and brittleness inability to dissolve in water a multicolored appearance

What is the primary goal of human communities?