After world war i, germany was forced to give poland a strip of land, called the polish corridor, which separated germany into two parts. the polish corridor is at
location 3
location 8
location c
location 9

I'm not entirely sure which area location C is referring to, but it would have to be the closest. Location 1 is Poland itself in the image you have provided, and the Polish Corridor is that small strip of land in orange right below the letter C. Hope this helped!

What do you need with? ? try to review those chapters and quiz yourself using flashcards to retain the information