Question

1. marisol es la ______ única de carlos y lucia.

Explanation:

This is a Spanish grammar problem related to possessive adjectives or nouns. The context suggests we need to fill in the blank with a word indicating "daughter" (since Marisol is the only one of Carlos and Lucia, likely their daughter). The correct word here would be "hija" (daughter in Spanish, feminine singular as Marisol is a female name and "única" is feminine singular).

Answer:

hija