Most of the images located on my page are used by googling "lemon fruit 1920x1080," "lemon fruit aesthetic," etc. However, I will credit every image on my profile directly beneath it.
My banner is from the site WallpaperDog. Due to the way it's designed, I can't send a direct link to the exact image, however
here is the page that contains it. (If you scroll 2/3 of the way down, it should pop up.)