Answer:
I am quick when Iām thin. I am slow when Iām fat. Wind is my worst nightmare.
You hear me speak, for I have a hard tongue. But I cannot breathe, for I have not a lung. What am I?
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves every day. What am I?
First I may be your servant's name. Then your desires I may proclaim. When your mortal life is over, I hold all your wealth within my power. What am I?
I am the signature stroll of ducks and penguins
No matter how little or how much you use me, you change me every month.