Toda la familia va a visitar a la suegro hijo abuela nieto

Abuela.

Explanation:

The sentence is "Toda la familia va a visitar a la ."

In English, would be "All the family is going to visit the "

where I translated "La" to "the", but there is an important factor, "La" is used to refer to a feminine person/thing.

The options to fill the blank are:

Suegro (

father in law)

Hijo (son)

Abuela (Grandmother)  

Nieto (Grandson)

The only feminine option is Abuela (Grandmother)

So the complete sentence would be:

Toda la familia va a visitar a la Abuela.

its like saying the