What is eARC and how is it different from ARC?

OREI HDA-934: Dual HDMI eARC HDMI Audio Extractor, Key Features:, HDMI 2.0b, and HDCP 2.2 compliant, Video resolution up to 4K@60Hz RGB/YCbCr 4:4:4,

4K HDMI Audio Extractor Switch With ARC/eARC and EDID management (HDA-934)

⚡[Use for ARC/ eARC Audio] It is a standard HDMI 2.1 version cable,which are equipped with eARC technology. (Compatible with arc function) Supports

Silkland 8K HDMI ARC/eARC Cable 2.1 for Soundbar 1.5ft, 8K@60Hz, 4K@120Hz High Speed HDMI Cord for Gaming, 48Gbps, HDR10, HDCP 2.2&2.3 Compatible for

What is HDMI ARC & eARC? Audio Return Channel Explained - Tech Advisor

Is eARC the same as HDMI 2.1? –

What is eARC and how is it different from ARC?

What you need to know about HDMI ARC and eARC

HDMI ARC/eARC: the one-cable TV audio tech fully explained

TV equipped with an HDMI connector and compatible with the eARC

How did 7.1 surround work before HDMI eARC?

So I'm a noob with all of this. Would I connect my PS5 to either

HDMI ARC vs. Optical – Which Is Better?