Help me with this civics work??

This term refers to the number of people per unit area (usually a kilometer or a mile). this could refer to the number of people per square mile in a city, a county, a province, a state, or a nation.

How would having more railroad tracks be advantageous during a war

The climate is named after a sea located to the south of europe. a: mediterranean b: baltic c: atlantic d: caspian