Mules are hybrid animals that result from breeding a male donkey and a female horse. They inherit desirable traits from both parents, such as strength and endurance, making them valuable for work and transportation. Mules are known for their sure-footedness and ability to navigate rough terrain, which is why they are often used in agriculture and mountainous regions. Mules are typically sterile, meaning they cannot reproduce. They come in various sizes and colors, depending on their horse parentage. Due to their intelligence and strong work ethic, mules are often preferred over horses for certain tasks, especially in challenging environments.