Please help, i really should of paid attention lol

Which best explains how this maneuver unblock a person's airway?

How do you transfer mrna into codons ? i'm so confused : (

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.