On the computer, the report button was to the left of the discussion button. On the phone the flag is the button for reporting. It is also near the discussion button.
In answer to below: It is harder in retrospect, reference this page, but they prefer a screenshot of the page with the exercise and your answer, since it gives them the actual exercise that you had for this phrase, as well as your exact answer, and all the information of which app you are using with which operating system, model numbers, etc. but that may be more important for an actual bug, try scrolling down to the help button below and scroll down there to access the bug report, but it is usually best to report at each exact sentence when you can. So when you practice and get this phrase again, that is when I would think it is best to report it.
Im writing the right answer....and it keeps marking it wrong? Ive even reported it and it wont change
There are four words (and a couple of relatives) in Spanish that change their form depending on what sound the next word starts with.
The singular feminine articles la ("the") and una ("a, one") change to the masculine forms el and un if the next word starts with a stressed 'a' or 'ha'. For example: "el agua" (the water), "un águila" (an eagle), "el haba" (the bean) are all feminine nouns. If the 'a' or 'ha' is unstressed, the article will remain in the standard form: "la arena" (the sand), "una agente" (an agent).
The same rules apply to forms derived from una, like alguna ("some") or veintiuna ("twenty-one"): "algún águila" (some (kind of) eagle), "veintiún habas" (twenty-one beans).
The word y ("and") becomes e when the next word begins with an 'i' or 'hi', regardless of stressing:
- padres e hijos - parents and children; but: hijos y padres - children and parents
- Hablo español e inglés. - I speak Spanish and English; but: Hablo inglés y español. - I speak English and Spanish.
Similarly, the word o ("or") becomes u when the next word behins with 'o' or 'ho', again regardless of stress:
- ¿Debería usar "vegetal" u "hortaliza"? - Should I use "vegetal" or "hortaliza"? ("Hortaliza" is the more appropriate term for "vegetable".)
- ¿Compraste huevos u olvidaste eso? - Did you buy eggs or did you forget that?; but: ¿Compraste huevos o los olvidaste? - Did you buy eggs or did you forget them?
Usually but not always! https://www.thoughtco.com/placement-of-adjectives-3079084
The word "de" is used to connect two nouns such as "un sándwich de pescado" for "a fish sandwich", but adjectives such as "elegante" come after the noun with no preposition. By the way, the noun that is being described comes first also when using "de", so "a fish store" would be "una tienda de pescado".
I understand your confusion though, because there are some adjectives that come before the noun in Spanish. https://www.thoughtco.com/placement-of-adjectives-3079084
So, a preposition is always followed by a noun. https://www.thoughtco.com/using-the-preposition-de-3079327
A boutique can be an elegant store, but not always. https://dictionary.reverso.net/english-spanish/boutique
Please report it as also correct if you put "An elegant shop."
https://www.thoughtco.com/noun-adjective-agreement-3078114 If the masculine singular ends in o, then it changes to a for feminine. If it ends in another letter, then it stays the same for feminine. Words are listed in the dictionary under masculine singular form. It does add an s for plural though. There are a few adjectives that are actually invariable.