Which best describes why Iwo Jima was significant in U. S. attempts to reach Japan? The island had airfields that the U. S. military needed.
The island had long-range anti-aircraft missiles.
The island was home to Japan's naval fleet.
The island had natural resources that the Japanese military needed.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.

map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.