The expression given to is: 7(b-2)
As we can see, b-2 is the difference of b minus 2. Likewise, 7(b-2) is the product of seven and the above difference of (b-2).
Therefore, the expression 7(b – 2) can be written in words as, "product of seven and the difference of b minus two".
Thus, out of the given options, the fifth (last) option is the correct one.