Why is "this is not good food" wrong?
That would be "Yehe achha khana nahi hai"
The food here is not good. is also correct though
No. That would be - यहाँ ka khana accha nahi hai.
Yea this seems natural.
"Yaha khanacha nahi hai." I've been trying to do these by listening first without looking then trying to type out what I think it is before looking at the choices. This one spoken so quickly threw me off at first!
Does this sentence mean that the food is not tasty or that the food has gone bad?
could mean either not tasty or not good.
If you wanna specify, the term for tasty is "Swaadisht".
gone bad will translate to "Kharab ho gaya hai"
Wow your service is very good