Consider the following activities:1. Spraying pesticides on a crop field2. Inspecting the craters of active volcanoes3. Collecting breath samples from spouting whales for DNA analysis. At the present level of technology, which of the above activities can be successfully carried out by using drones?
✓ Correct answer: d) 1, 2 and 3
ExplanationA drone, technologically, is an unmanned aircraft.They are formally known as unmanned aerial vehicles (UAVs).A drone is essentially a flying robot that can be remotely piloted or can fly on its own using software-controlled flight plans in embedded systems in conjunction with onboard sensors and GPS.Statement 1 is correct: Modern agriculture has increasingly adopted drones for the application of pesticides and fertilizers.These drones offer precision in spraying, ensuring uniform coverage and reducing the exposure of farmers to harmful chemicals.For instance, a study published in Springer highlights that drones equipped with advanced sensors and high-resolution cameras can distinguish between healthy and infested crops, allowing for targeted pesticide application.Statement 2 is correct: Drones equipped with visual and thermal cameras are utilized in geological studies to inspect active volcano craters.They can safely approach hazardous areas, capturing high-resolution images and collecting gas samples.Researchers from the German Research Centre for Geosciences (GFZ) successfu
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