Which outcome changes a crystal's conductive properties using doping?

💡 Explanation

Electron-hole pair creation alters conductivity via increased free carriers. This works because doping introduces impurities, which enhances the **generation rate** of electron-hole pairs within the semiconductor crystal; therefore, conductivity changes, rather than options involving other processes because phonon scattering involves molecular vibration, while magnetic and Debye properties do not directly change the conductive capability.

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