Consider the following activities:

1. Spraying pesticides on a crop field
2. Inspecting the craters of an active volcano
3. 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 using drones?

1. 1 and 2 only
2. 2 and 3 only
3. 1 and 3 only
4. 1, 2 and 3

Explanation

All statements are correct

• Spraying pesticides on a crop field: Drones equipped with spraying mechanisms are commonly used in agriculture for spraying pesticides, herbicides, and fertilizers efficiently and precisely.
• Inspecting the craters of an active volcano: Drones are employed to inspect hazardous areas such as active volcanoes, allowing scientists to collect data and observe without exposing themselves to dangerous conditions.
• Collecting breath samples from spouting whales for DNA analysis: Drones are increasingly used for collection of biological samples, including whale breath, which helps in studying whale health, genetics, and diet.

Answer: (d) 1, 2 and 3; Difficulty Level: Easy