Question

El mecánico las usa y nos dice que son sus favoritas.

Answer 1

Answer: las herramientas

Sentence: El mecánico usa las herramientas y nos dice que son sus favoritas.

Translation: The mechanic uses the tools and tells us that they are his favorites.

Explanation:

Since the direct object pronoun is "las", which is feminine and plural and must agree with the direct object in gender and number, the direct object must also be a feminine and polural noun. The only feminine and plural noun option is "las herramientas".

Spymore

Answer 2

“Las herramientas”

Because it means the tools and that’s something a mechanic would love