My Dodge Grand Caravan just conked out...

(note: my car knowledge is three decades out of date so I effectively don't know anything about them nowadays)

Vehicle was running fine with no problems. This morning, came out and tried to start it. Starter turns but no sound or sign of the actual engine turning over. There is fuel, though not much, but more than enough to run for some time on.

Noticed what I think is a grounding strap -- appears to be braided copper -- that's corroded through on the lefthand side, a little way above a pulley near the starter; looks like the corrosion just finished eating through. Could that be it, and if so what's the part name so I can go get one and replace it?

If that's not it, any ideas as to what it could be?