What is the appropriate Spanish translation for "Call an ambulance"?

The phrase "Call an ambulance" directly translates to "Llama a una ambulancia" in Spanish. The verb "llama" means "call," and "una ambulancia" means "an ambulance." This phrase gives a clear directive to contact emergency services, which is crucial in situations requiring immediate medical assistance.

In contrast, the other options convey different meanings. For instance, "Llama a un taxi" translates to "Call a taxi," which relates to transportation rather than medical help. "Espera aquí" means "Wait here," providing an instruction to stay put, but it doesn't address the urgent need for an ambulance. "Solicita ayuda" translates to "Request help," which is vague and does not specify that it is an ambulance that is needed. Therefore, the selected answer accurately reflects the intent of the original English phrase regarding medical emergencies.