QUE PROBLEMA DE CALIDAD TIENE MI FOTO Y COMO MEJORARLA

Hello,

Basically, your image isn't sharp. (Not for stock.)  Did you take this with a DSLR/Mirrorless camera? Did you use a kit lens that came with the camera? If so, these lenses aren't that good! Not good enough for stock, because they lack sharpness. The focus here is too soft.

Zoom in between 100-200% and you will see that focus on the animal is too soft, which could have occurred due either to subject motion or camera motion.