Why did USB 3.0 live in 10? What is the minimum pins for USB 3.1?

Question

USB

Why is there 10 wires in the 3.0 cable when there are 9 pins in the plug ?
Does the USB 3.1 specification provide only type-c (24pin)?

Answer 1

This is needed for B-type connectors, as well as micro. USB 3.1 Type C provides for the possibility of a mirror connection (so that there is no superposition when connected) and plus additional lines, which is why it seems that there are more.

Answer 2

Most likely, both of these cores are connected to the ground

Answer 3

this contact will be thrown to hell