How would you solve this Algebra 2 problem?

I have never encountered a problem like this in my life. How do I solve this? What do i do exactly? Talk to me like I'm 5 cus this is bizarre to me.

?2019-04-24T13:08:30Z

To find f(g(3)) you first need to find g(3), and substitute.
g(3) = -1 so f(g(3)) = f(-1) = 1

The correct answer is: (D) 1.