Answer:
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
Kills the bad ones and the sad ones. Tightens to fit, so one size fits.
Four of us are in your field, But our differences keep us at yield, First, a one that is no fool, Though he resembles a gardenerโs tool, Next, one difficult to split in two, And a girl once had one as big as her shoe, Then, to the mind, oneโs a lovely bonder, And truancy makes it grow fonder, Last, a stem connecting dots of three
Being able to interpret the letters on this screen proves that you have this quality.
What has four wings but cannot fly and uses the wind but does not know why?
What never asks questions but receives a lot of answers?