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?
My second is performed by my first. A thief by the marks of my whole might be caught. What am I?
I am of several different kinds, but the one you pick doesn't do its job. What am I?
I shift around though always slowly. I never move more than a few inches at a time. A large movement by me can kill many people. I am huge yet unseen by humans.
What has keys but no locks a space but no room and you can enter but can't go in?
Whatโs a carpetโs favorite sport?