Perhaps the most successful way we've been able to use light to transfer information is fiber optics. ... Through rapid changes in the light, you can send highly complex signals down the cable. These are most often used either for high speed internet connections, or for sending sound signals to home theater systems.
Answer:
A peace treaty is an agreement between two or more hostile parties, usually countries or governments, which formally ends a state of war between the parties
C so the air goes through easier, is what I think
