Final answer:
The compact approach in CSS uses shorthand properties to specify multiple styles in one line of code, while spelling out each property individually means explicitly declaring each property to be styled.
Step-by-step explanation:
In CSS, there are two approaches to applying styles to multiple elements: the compact approach and spelling out each property individually.
In the compact approach, you can use shorthand properties to specify multiple styles in a single line of code. For example, instead of spelling out the background-color, background-image, background-repeat, and other related properties individually, you can use the background shorthand property to define them all at once.
On the other hand, spelling out each property individually means explicitly declaring each property you want to style. This approach allows for more control and specificity but can lead to more code.