I have tried opening a preview in Illustrator but the resolution is shocking. I can't tell if the images are meant to be icon sized, or vectors I can enlarge (it does say vector as a key word)?Different type of food and dessert - image | Adobe Stock
There is an option of file properties where you can check the File type.
For your image, the file type says: AI/EPS which means a vector image and requires Adobe Illustrator.
Also refer Common Questions, Adobe Stock
Hope that helps!
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