video1.0<iframe src="https://www.loom.com/embed/bf1a7c6551504486a71db5e0551e1ed1" frameborder="0" width="692" height="519" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>519692Loomhttps://www.loom.com519692https://cdn.loom.com/sessions/thumbnails/bf1a7c6551504486a71db5e0551e1ed1-00001.jpg150p: The main purpose of the passage is to a: describe how squadrons of planes can save fuel by flying in a V formation. ; discuss the effects of downdrafts on birds and airplanes. ; explain research conducted to study why some birds fly in a V formation. ; illustrate how birds sense air currents through their feathers. ;