"I eat fruits for a meal."

Translation: 저는 식사로 과일을 먹어요.

[zutterbaby]

Is 먹어요 informal, and 먹습니다 formal?

[SabianF]

먹습니다 is max politeness, 먹어요 is standard politeness, and 먹어 is casual.

[wintertriangles]

More like low formal and high formal respectively. 먹어 is informal.

[KyleBeck9]

맞아요

[TeguhAdita]

Yes!

[SeanYu9]

Can Duolingo indicate which politeness level they want, maybe in brackets?

Sometimes it's polite, sometimes formal. Drives me nuts.

[KerenRivero]

I think both ways are formal