It's a group wave, or something that happens simultaneously. Unless the meaning you need is a fun little body wave! (: There's no rules but to jump out of your seat with your arms up! I hope all is well, and this is what you were looking for! Good luck, rockstar! (:
To hit the target the crew drop the crate before the plane is directly over the target. It is because <span>because the cargo has forward velocity and therefore before it reaches the ground it travels some distance. The answer is A. Hope it helps. </span>