Is one method of flower pollination more common among the flowers studied than another?

Well first we have to define what pollination is. Pollination is a process where the pollen is being placed in the stigma. Where the anther produces the pollen and too in the androecium whorl. Stigma is the sticky part of the androecium whorl. There are pollination by wind, animals and a lot more.

The piano could only be played with 12 fingers, which is rare because humans normally have ten fingers.