Question

drone racing
lots of people fly drones just for fun, too. some of them belong to drone - racing leagues. they play against each other on obstacle courses that are set up in fields, warehouses, and even football stadiums. racers wear goggles, or large glasses, that show them exactly the same thing as what the drone camera sees.
a drone racer wears goggles and uses a remote control transmitter to command his drone.
why do drone racers use special goggles?
to protect their eyes from sweat
to have a wider view of large spaces
to see what the drone camera sees
to see drones that are far away

Explanation:

El texto del artículo dice: "Racers wear goggles, or large glasses, that show them exactly the same thing as what the drone camera sees." Entonces, la razón por la que los pilotos de drones usan gafas especiales es para ver lo que ve la cámara del dron.

Answer:

The option (the second one) with text "to see what the drone camera sees"