Answer:
Change the pitch of your voice
Explanation:
if i wanted you to listen to a key point in my speech i would speak it in a slightly different tone so that way you would pay more attention to it. often in commercials you will notice the change in pitch to get your attention.
Things that can cause people to "grow up" are often seen as traumatic but, can be the exact opposite; inspiring the person or "opening their eyes".
Collective nouns are always singular
Ex. A flock of birds is migrating to the South.