OK, so the image above has an inherent aspect ratio of 3:2. When you insert an Image Element, and add an image to it, the Image Aspect Ratio is, by default, set to Automatic, and displays the image at it’s native aspect ratio.
There is a dropdown list under the Image Aspect Ratio options, and here, you can override the native aspect ratio with one of your own. The selections available are 1:1, 2:1, 2:3, 3:1, 3:2, 4:1, 4:3, 5:4, 16:9, 9:16, 21:9, 9:21, and Custom.
Note; if the higher number is at the start of the ratio, the image will display as a landscape image, whereas if the lower number is at the start, it will be a portrait image.
In the image below, I have chosen an aspect ratio of 1:1, which crops the image square.