Hi
Son los pantalones de Roberto. Son sus pantalones.
A- tus ==> your + plural noun <em>(not formal)</em>
B- mis ==> mines + pl. noun
C- sus ==> his + pl. noun <em>(his + your plural and formal)</em>
D- su ==> his + sing. noun <em>(his + your formal)</em>
+ singular noun + plural noun
yo mi mis
tú tu tus <em>(informal)</em>
él/ella/Us su sus
nosotros nuestro/ nuestra nuestros/nuestras
vosotros vuestro/vuestra vuestros/vuestras
ellos/ellas/Uds su sus
<em>They are Roberto's trousers. They are his trousers.</em>
The possessive adjective agrees in gender and number with the possessed noun, annd NOT with the possessor
Explanation:
This is what you got (translated)
- Mexico is geographically located at the ____ of the United States.
- Nowadays there are ____ of people of mexican ancestry in the United States.
- The spoken tongues in Mexico are spanish, ___ and other indigenous languages.
- Frida Kahlo, wife of the artist____, is known for her selfportraits.
- The___ empire ruled Mexico during the XIV and the XVI centuries.
- The Día de los muertos is celebrated in the____.
Being in english we see is very easy:
- south------------------------sur
- a greater number------- un mayor número
- nahuatl----------------------nahuatl
- Diego Rivera------------- Diego Rivera
- first---------------------------primer
- cemeteries----------------cementerios
Hope this helps!