im guessing you want this to be translated, so it translates to "
They arrive at the school at eight-fifteen" :)
Las válvulas distribuidoras pueden clasificarse en dos grupos means "The distributor valves can be classified into two groups"
For this case we have the following dialogue:
Elena: ¿De dónde eres Carlos?
Carlos: Soy de Cuba y mis compañeros son de Estados Unidos. ____________________ son (They are) de Texas.
We note that we must translate the expression in parentheses to fill in the blank.
The expression in parentheses represents the third person of the plural.
For this case, the third person in the plural is male.
Therefore, the correct word is:
"Ellos"
The complete dialogue is:
Elena: ¿De dónde eres Carlos?
Carlos: Soy de Cuba y mis compañeros son de Estados Unidos. Ellos son (They are) de Texas.
Answer:
C. Ellos
He writes a small composition about the following aspects: The myth talks about the time of the creation of the world. Indigenous traditions are part of our culture.