In this sentence, we have two words. First, le is the indirect object pronoun that matches the third person singular. An Indirect Object Pronoun is a person that receives the action of a verb indirectly. Its purpose is to tell you to whom or for whom something is done. So the action of this sentence is being performed for Juan, that is, for him. On the other hand, since after the second blank comes an infinitive verb, then the conjugation of the verb gustar must match the third person singular, which is gusta. Finally:
¿Qué le gusta hacer a Juan en vacaciones?
Answer: Se llama "refinería" a una instalación industrial donde se refina o purifica un producto.
Translation: It is called "refinery" to an industrial facility where a product is refined or purified.
agrada, basta
agradan, bastan
sobra, fascina
ONLY SPANISH SPEAKERS
Im a spanish speakers hahahah tha sounds weird
The answer is agrada,basta
Ella busqué el tesoro.
Ella buscó el tesoro.
Ella buscaron el tesoro.
Ella busca el tesoro.