Remote sensing involves the use of :
The correct answer is option C.
Remote sensing detects and monitors physical characteristics of an area by measuring reflected/emitted radiation.
It relies on electromagnetic radiation (EMR) from the Earth's surface.
NMR (Nuclear Magnetic Resonance) and ESR (Electron Spin Resonance) are unrelated techniques.
SSR (Solid-State Relay) is an electronic component, irrelevant here.
EMR includes visible, infrared, and microwave spectra used in satellites.
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