What is the relationship between wireless channels and data transmission?

Wireless channels have a defined bandwidth (e.g., 20 MHz, 40 MHz, 80 MHz).

Wider channels can carry more data simultaneously, as there’s more spectral space for transmission.

Modern Wi-Fi standards (802.11n/ac/ax) use channel bonding to increase throughput by widening channels.

The other options are not correct:

Data can be transmitted across multiple bonded channels.

More channels do not necessarily mean higher power use.

Channels are used bidirectionally.