Parameters CSS saturate filters

Question

Why ask how many parameters in CSS with saturation if there is only one? Why make parameters plural? Should it not be what’s the parameter?

Answer 1

Just one, it can be either a number or percentage

Answer 2

The key learning aspect in that question is the fact that you only need to remember that one can saturate elements and thats the exact name of the filter, so remembering that there is only one paramter is the crucial part to ask for