Hello!
"El árbol es ______", translates to "This tree is ______." Since we are given two choice, suyo and suya, one of the them is obviously feminine and ther other is masculine.
Since "el árbol" is masculine, we use the possessive word, "suyo", meaning "yours".
Therefore, el árbol es suyo.
Llore por la muerte de su perro
B) to indicat a length of time, hope this helps
Les gusta means they like
Nos gusta means we like
Te gusta means you like
Le gusta means likes