Which feature in Photoshop is primarily used to enhance the aspect ratio while resizing?

The Content-Aware Scale feature in Photoshop is specifically designed to resize images while preserving the important visual elements and aspect ratios of the image. This capability allows users to stretch or compress images without distorting key features. It analyzes the content of the image and applies the rescaling process in a way that maintains the integrity of the subject matter, effectively enhancing the aspect ratio during the resizing process.

Unlike the Transform Tool, which can resize equally across height and width, or create arbitrary aspect ratios depending on how it’s used, Content-Aware Scale intelligently adapts the image. Smart Objects allow for non-destructive transformation, but do not specifically enhance the aspect ratio in a meaningful way during resizing. The Shape Builder tool is primarily concerned with vector shapes and does not apply to image sizing or aspect ratio adjustments. Thus, Content-Aware Scale is the feature best suited for the task at hand regarding maintaining aspect ratios while resizing images.