Answer:
No matter how little or how much you use me, you change me every month. What am I?
This is a plant named after a light source. What is it?
I am the yellow hem of the sea's blue skirt.
A prehistoric reptile that lives today and the inspiration for the name of a popular sports drink.
What can be measured but has no length, width or height?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.