Respuesta :
False. If you were referring to a woman then it would be Merci mon amie. (Notice the extra e).
Bonjour
Thank you my friend = Merci mon amie for a woman.
In English, my friend can be masculine or feminine.
In French, we have a masculine and feminine different nouns and possessive adjectives.
mon amie = feminine (see below for the possessive adj.)
mon ami = masculine
If "ami" was beginning with a consonant, the possessive feminine adjective would have been "ma".
example =
mon copain
ma copine
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hope this helps ☺☺☺