Question

drones to the rescue
one drone rescue took place in wisconsin. an 82-year-old man was missing from his home. rescuers searched for three days, using helicopters, trained dogs, and volunteers. but they had no success. then one rescue volunteer flew his drone over a big field. it would have taken hours to search that area from the ground. in just 20 minutes, the drone’s camera spotted the missing man. the police were told, and they returned the man safely to his family.
after any disaster happens, drones can be sent out to check the damage to buildings, roads, and bridges. drones can show rescuers exactly where people need help. they can even deliver first-aid supplies to anyone trapped in a dangerous spot.
why was the drone able to find a missing man when helicopters and dogs could not?
it could deliver first-aid equipment.
it could land in a dangerous spot.
it could fly for hours without stopping.
it could search a large area quickly.

Explanation:

El texto dice que el dron "buscó esa área desde el suelo. En tan solo 20 minutos, la cámara del dron localizó al hombre desaparecido". Esto indica que el dron podía buscar un área grande de manera rápida, a diferencia de helicópteros y perros que no lo lograron en tres días. Las otras opciones no se apoyan en el contexto: no se menciona que vuele horas sin parar, que aterrice en lugares peligrosos (en el texto se habla de entrega de suministros a lugares peligrosos, no de aterrizaje) ni que entregue equipos de primeros auxilios en este caso específico de rescate del hombre.

Answer:

It could search a large area quickly.