What kind packets of the Wireshark capture’s package?

We know we can use Wireshark for capture packets, we know Wireshark is based on the network interface adapter.

This is a list of packets captured by Wireshark:

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Is Wireshark based on the network interface adapter, so all the packets are data frames (Layer 2's PDU)? Or all the packets are bits, converted to the list by Wireshark?

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