❤❤❤, really. You put both "large" and "big" in the pool but note only one of those as correct. That's just unbelievably lousy. I understand you don't have a y linguists in the team but there's no editor with a sharp eye, neither. Come on, Finland can do better, I can confirm that as an Estonian.
The course is still in beta. Always report (by clicking the flag) if you find an error, missing translation etc. Then the team can actually see that there's something that possibly needs to be fixed. After they make the necessary changes, it takes a couple of weeks for Duolingo to update and include them.