"My meal is too cold."
Translation:tlhoy bIr nay'wIj.
You are correct. It is not necessary. It was not required in the answers and if you got it wrong, there was some other error. Grammatically, it is optional, but perhaps a different English sentence representing the stress of the -'e' would be better, like "It's my meal that is too cold." Early in the creation of this course, we started with the idea that we should include all the options with 'e'. We later decided that it was a mistake both because the English sentence should really reflect the change and because we were having to add way to many variations. It turns out that this sentence was created early in the course and has not been revisited since. I've removed the -'e' now as even being an option.