Is a cacti a natural selection or selective breeding?

Cacti are primarily a product of natural selection, as they have evolved over millions of years to adapt to their arid environments. Their unique features, such as thick skin and water-storing tissues, are traits that have been favored in survival. However, some cacti have also been subject to selective breeding, particularly in cultivation for ornamental purposes, resulting in various hybrid varieties. Thus, while the majority of cacti are a result of natural selection, selective breeding plays a role in their diversity in cultivated settings.