Bonjour
The possessive adjectives agree with the following noun in French
1- son appareil photo (masc. sing.)
2- ton ordinateur (masc. sing.)
3- mes parents (plural)
4- leur parapluie (masc. sing.)
5- sa rubrique société (fem. sing.)
6- mon opinion (fem. sing. + word beginning with a vowel = "mon" instead of "ma")
7- Vos amis (plural)
8- son film (masc. sing.)
9- notre documentaire (masc. sing.)
10- ta petite-amie (fem. sing.) OR ton petit-ami (masc. sing.) ... petit-amie isn't correct
11- Tes cours (plural familiar)
12- Ses sous-titres (plural)
13- Votre voisin (masc. sing. formal)
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- plural possessive adjectives are both masc. and feminine.
- "ma, ta, sa" become "mon, ton, son" in front of a feminine noun beginning with a vowel = ton orange, mon amie, son école ....;
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hope this helps ☺☺☺