What does "change detection" in remote sensing entail?

"Change detection" in remote sensing refers specifically to the process of identifying differences in the state of an object or environment over a period of time using data collected from various sensor technologies. This is essential for monitoring and managing natural resources, urban development, disaster response, and environmental changes. By comparing images or data captured at different times, analysts can observe how particular features or conditions have evolved, such as vegetation growth, land cover changes, urban expansion, and the impacts of natural disasters.

The concept fundamentally hinges on the ability to use temporal data to track changes, making option C the correct choice. This process is critical in various applications, including environmental monitoring, infrastructure management, and agricultural assessment, allowing for informed decision-making based on the specific alterations detected over time.