Cultural diffusion is the process by which cultural beliefs, practices, and items spread from one society to another. This can occur through various means, such as trade, migration, or communication. For example, when people from different regions interact, they may exchange ideas, languages, and customs, leading to a blending of cultures. An example of cultural diffusion is the spread of pizza from Italy to many parts of the world. As people traveled and settled in new areas, they introduced their culinary traditions, which were then adapted and modified by local cultures, resulting in diverse variations of the original dish.