Answer the following question given this paragraph: 

After trees are cut, logging companies often move these materials down a river to a sawmill where they can be shaped into building materials or other products. The logs float on the water because they are less dense than the water they are in. Knowledge of density is important in the characterization and separation of materials. Information about density allows us to make predictions about the behavior of matter.


Q: What property allows cut logs to float on water?

 Choices:

- polarity

- heat

- precipitation

- density

A:
density
