Final answer:
Drones have been used to deliver goods and monitor weather, but not to perform surgeries or control traffic.
Step-by-step explanation:
Drones (quadcopters) have been used to reduce search areas, map crime scenes, and deliver goods. They can be used to transport packages and products from one location to another, providing a faster and more efficient way of delivery. For example, companies like Amazon have experimented with drone delivery services to bring packages to customers' doorsteps.
In addition to delivering goods, drones can also be used to monitor weather. They can gather data about temperature, humidity, wind speed, and other weather conditions from various altitudes and locations. This information can be useful for meteorologists and weather forecasters in predicting and understanding weather patterns.
However, drones are not used to perform surgeries or control traffic. Surgery is a highly specialized field that requires precision and human expertise, while traffic control is typically carried out by trained personnel and automated systems.