Answer:
Los padres son impacientes.
Explanation:
The correct adjective is "impacientes": Los padres son impacientes. This means "The parents are impatient". In Spanish, adjectives have plural and also gender (most of them). So when talking about parents, which is plural, the adjective must be plural as well. The first adjective, "perezosa" not only is singular but also female. It means a female lazy person. The second one is singular and used for male nouns. It means serious. The third one is also singular and for male nouns, it means tall. The last one is plural and can be used both for female and male nouns. That's the correct option.
