Answer:
I can be winding and I can be straight. I can be smooth and I can be rough. Sometimes both. I start out black but fade to brown. My favorite colors are yellow and white and I love stripes and dashed lines.
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 everyday
I am often sold by children entrepreneurs in summer time
I am a type of animal that hang out in the mist
I am used when you jump off a bridge for fun.
No matter how little or how much you use me, you change me every month.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic