문제 내용: 다음 글의 내용과 일치하는 것은?
선택지 1: A shark has scales that always remain immobile to protect itself as it swims.
선택지 2: Lang revealed that the scales of a mako shark are utilized to lessen drag in water.
선택지 3: A mako shark has scales of identical size all over its body.
선택지 4: The scientific designs of airplanes were inspired by shark scales.