How does the format of a flattened image differ from a layered image?

The correct answer highlights a fundamental aspect of image management in graphic design and digital imaging. A flattened image essentially takes all the individual layers present in a layered image and combines them into a single, cohesive layer. This process merges all visual elements into one complete image, which helps to streamline file sizes and is often necessary for formats that do not support layers.

In contrast to a flattened image, a layered image preserves individual elements, allowing for flexible editing. Each layer can contain different graphics, effects, or adjustments independently, which is essential when changes are required without affecting the entire composition.

Flattened images are commonly used when saving final versions of artwork, as the individual layers are no longer needed. However, this process leads to a loss of the versatility that layers provide, such as the ability to easily adjust elements or maintain transparency in certain formats, which is why it can be harder to edit a flattened image compared to a layered one.

While options referring to details, editing, and transparency hint at important features in image formats, they do not specifically address the core difference in composition between flattened and layered images as accurately as the selected answer does.