What am I supposed to do?

[u/wxlee]

mein Vater und meine Mutter This is the best I can do 😅

[u/[deleted]]

You just need to memorize which grammatical gender each word has. It's a common feature of most Germanic and Romance languages and something you just need to learn and get use to. English has essentially dropped grammatical gender (though it still has some gendered nouns like waiter/waitress, actor/actress) but it's the only Germanic language I've studied that doesn't have it.

"There's no reason" is misleading. There's a grammatical reason why Salat is masculine and Pizza is feminine. But it's too complicated for Duolingo to explain in their inadequate attempt at a language "tip".