The Battle of the Coral Sea introduced a new kind of warfare in which airplanes were used to attack opposing ships. Option 3 in correct.
The Battle of the Coral Sea was a new kind of naval warfare, due to the fact that it was the first conflict in which aircraft carriers engaged each other, and the ships from both sides did not sight or fire at each other. This was a battle fought in World War II in the Pacific Theater, between the Japanese army and American and Australian forces.