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?
3 point goal
I am needed for most animals and hardcover books
I am heavy forward, but backward I'm not. What am I?
I am black and white. I have strings I have keys. I make sound without my lips. I make dough with no flour
No matter how little or how much you use me, you change me every month.