The image is a slice of watermelon which has the words called " I love summer". The words are depicted with 88 watermelon seeds .that is, they are written in "watermelon fonts". I guess there exists seed fonts like this in any fonts delivering sites.
This is a completely free image Watermelon-font that you can download, post, and use for any purpose.
Image License: CC0 No Rights Reserved
You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission, and at no cost. This image is completely free.