Option A, This ability allows the machine to climb and descend vertically so that it can access places that would be unsafe for people to go
Explanation:
Humming bird drones mimic several birds and insects that are able to climb and descend vertically along with being able to fly backward and in forward direction and also sideways. These drones can also rotate clockwise and counterclockwise. All these features made them adaptable to remote locations for video and audio recording.
