The correct answer is: B. Visible region
The Earth’s atmospheric window is the range of wavelengths of electromagnetic radiation that can pass through the Earth’s atmosphere to reach the surface. This window is centered on the visible region of the electromagnetic spectrum, with wavelengths between 380 and 700 nanometers.
The visible region is the only part of the electromagnetic spectrum that humans can see. It is also the part of the spectrum that is most important for photosynthesis, the process by which plants use sunlight to create food.
The Earth’s atmospheric window is important because it allows sunlight to reach the surface, which is necessary for life. It also allows us to see the world around us.
The other options are incorrect because:
- The ultraviolet region is the part of the electromagnetic spectrum that has wavelengths shorter than visible light. This radiation is harmful to humans and other living things.
- The infrared region is the part of the electromagnetic spectrum that has wavelengths longer than visible light. This radiation is heat.
- The polar regions are the regions of the Earth that are near the North and South Poles. These regions are cold and have very little sunlight.