Why might an embedded system use a "hardware random number generator" (HRNG) instead of a pseudo-random number generator (PRNG) for cryptographic key generation?

A A PRNG produces deterministic output from its seed; a predictable or low-entropy seed (common on constrained devices at boot) yields guessable keys, whereas an HRNG uses physical entropy for stronger randomness B PRNGs always produce more secure output than any HRNG in every situation C HRNGs are used only to generate random colors for a device's display D There is no security difference between PRNGs and HRNGs for cryptographic purposes