while selecting one item out of multiple items that are all identcal we have only 1 way of selection.
It is obvious that their positions must be different.
The correct answer must be 1because we are selecting 1 item, not 1 position.
ways to select 1 black square are = 1,
and to clear your doubt,
ways to select 1 position out of 32 valid positions = 32C1 = 32.