Answer:
I am found in the sea and on land but I do not walk or swim. I travel by foot but I am toeless. No matter where I go, I am never far from home. What am I?
I start in little but I end in full you'll find me in half and complete.
You heard me before and then again. Afterward I die until you call me again.
You cannot keep me until you have given me. What am I?
What is harder to catch the faster you run?
No matter how little or how much you use me, you change me every month.