Select the living thing.

 - Mount Rushmore National Memorial
 - zebra
 - rainboot
 - bathtub
Mount Rushmore National Memorial is not a living thing.
The Mount Rushmore National Memorial is a sculpture of four American presidents: George Washington, Thomas Jefferson, Theodore Roosevelt, and Abraham Lincoln. The sculpture does not have all the traits of a living thing. It does not grow or respond to the world around it. It does not need food or water.
A rainboot is not a living thing.
Rainboots do not have all of the traits of living things. They do not grow or respond to their environment. They do not need food or water.
A zebra is a living thing.
Zebras grow and respond to their environment. They need food and water. Zebras are made up of many cells.
A bathtub is not a living thing.
Bathtubs do not have all of the traits of living things. They do not grow or respond to their environment. They do not need food or water.