Which part of a camera opens and closes briefly to allow light into the camera?

Write an argumentative paragraph answering does technology make us feel more alone?

Which sentence is correctly punctuated? a. i haven’t found a new job, and i don’t plan to look for one until i have to. b. my work is piling up—day to day—and i can’t seem to get caught up. c. i know things could be worse (they have been in the past).

What logical prediction can be made from this passage?