Answer:
Infrared is the portion of the energy spectrum that is particularly useful for differentiating vegetation from space.
Explanation:
The infrared spectrum is a range of electromagnetic radiation that goes far beyond the perception of common light. They are mostly radiated by temperature producing sources, helping the viewer to differentiate from cold or hot objects. In this case, vegetation will have a surface that will vary in temperature. While space that doesn't produce temperature but absorb it cand be distinguished by the viewer.