Brakes loose, cable hanging out
The inner cable is very rusty. I would think that the cable friction is so great that the spring of the brake cannot pull back against it. Maybe at the other end of the cable, something has popped out of place, you can inspect the other end and see if this is the case.
Ultimately, the solution is going to be to fit, or to have fitted, new cables and the brakes setting up again to work well. If that cable condition is indicative of the rest of the bike, a good service is due which will make it nicer and safer to ride.