Answer:
picture of the art please! Then ill come back and edit this :)
Explanation:
If this is the question I'm thinking of and has answer choices, it should be "None Of The Above".
You could no longer do standard seaming, but you could do free motion embroidery.
If you want to fix this there are a few common ways that they get broken and fixed from home:
thread could be jammed, just remove the needle plate and clean
hasn't been lubricated in a while, either take it in and have it done or do it yourself with a drop of sewing machine oil
or because they're dropped, in this case just look for a switch.
if it's not any of these, you may want to take it in and have it looked at :-)