What's the difference between 10 2 wire and 10 3 wire?

Difference Between 12 2 12 3 Wire

What's the difference between 10 2 wire and 10 3 wire?

What's the difference between 10 2 wire and 10 3 wire?

What's the difference between 10 2 wire and 10 3 wire?
What's the difference between 10 2 wire and 10 3 wire?