Answer: Usually on a map, solid lines represent boundaries between nations, or if it is a map of the states, it would represent the borders of the states.
Explanation:
Anemometer is what is used.
The answer is - Sponge.
Sponges are very lightweight, they have large percentage of voids as well, this practically means that they have low density structure. Their density is smaller than the density of the water, so this means that it will float on the water instead of sinking.
The greatest common factor is 1
Only congress can declare war