* Organisms are living things. They are made up of cells, grow and develop, reproduce, and respond to their environment.

* Feathers are non-living structures. They are made of keratin, a protein, and are part of a bird's body, not a living entity on their own.

Here's a breakdown of the difference:

* Organisms: Birds, humans, bacteria, plants, etc.

* Parts of organisms: Feathers, bones, leaves, etc.

Think of it this way: A feather is like a fingernail or a hair. It's a part of a living thing, but it's not alive itself.