Please note that Yelp requires business owners to upload a real photo that's a clear shot of the business owner, and the Yelp moderators need to approve the photo before you can respond to reviews.
Accepted photos: a real, clear photo of the business representative so that Yelpers can attach a face to their interactions.
Rejected photos: a group of people, far away photos, blurry photos, stock photos, logos, storefronts.
Refer to this article by Yelp for more info on this.