They are often used for their sticky sap which can be used for many different reasons.
Pine Trees.
A wide variety of pine trees are used for Christmas trees in the US. White Pines are common.
Pine Tree shaped air fresheners.
No, Pine Trees have pine needles, not leaves
Yes, pine nuts are real nuts. They are the edible seeds of pine trees and are often used in cooking and baking for their rich, buttery flavor.
Christmas tree
pine
wind block
Pine trees of course!
A plantation (area of trees) of pine trees
Turpentine.
Habitat is generally used for animals, just so you know. Anyway, pine trees are usually found in temperate or subtropical zones.