I had a pick-the-word question earlier with the clue "dead hedge" and the solution "morta"

struck me as odd.

If we don't know the gender, the verb [morire] would default to masculine. So, “È morto” could be ‘he died’ or ‘it died.’ As the statement is “È morta” it must be ‘she died.’ ['She is dead' was also accepted. 14 Oct 2014.] I hope that helps. Ciao.

yes, why not, if it is for example a plant (la pianta), suppose that would be oké

That's how I translated it and it was marked wrong.

Essere is used with reflexive verbs and verbs meaning moving, avere is used with most of other verbs.

maybe because it is "morta" not "morto" ?? I'm not that far so its only a guess

'He died' is 'è morto'. As a general rule (I'm sure there's some exceptions) if the lui/lei form of the verb ends with an 'a' (e.g. 'è morta') it implies a feminine gender. If it ends with an 'o' ('è morto'), it's a masculine gender.

Verbs that use ESSERE as the auxiliary must agree with gender and number. NOTE: Verbs that are reflexive will use ESSERE as the auxiliary as well.