`background` shorthand allows setting multiple background properties (color, image, position, repeat, etc.) in one declaration.
`background: red url('bg.jpg') no-repeat center;` correctly combines background properties.
The usual shorthand order is: color → image → repeat → position/size → attachment.
The shorthand sets a background image with `no-repeat` behavior.
`background-align` is not a valid CSS background property.
`none` in shorthand clears all background properties including image and color.
`background-size` is not always included unless specified using the `/` separator.
`background: black url('bg.jpg') no-repeat center;` is the correct shorthand.
`background: #333;` sets only the background color using shorthand.
`background` shorthand works inline like this: `<div style="background: red;">`