What characteristics is not shared by both a horse and the grass it eats?

Horses are mammals that possess characteristics such as a complex nervous system, warm-blooded metabolism, and the ability to move actively and respond to stimuli. In contrast, grass is a plant that undergoes photosynthesis, has a rigid cell structure, and does not exhibit conscious movement or behavior. Additionally, horses can feel pain and emotions, while grass does not have a nervous system or the capacity for sensation. These fundamental differences highlight the distinct biological classifications of animals and plants.