Final answer:
The most common human practices involve religion, use of water for agriculture, and varied cultural norms such as conversational etiquette and transportation methods which differ around the world.
Step-by-step explanation:
The tendency for human beings to align themselves with groups with whom they share values and practices is a global phenomenon that transcends various aspects of daily life. From organized religion to cultural practices and agricultural methods, humans have shown a propensity to form and follow collective behaviors. For instance, religious practices can vary in intensity around the world, with some societies integrating religion into almost every aspect of life, while others maintain a more secular lifestyle.
World-wide, the most common human practice involves using water primarily for agriculture, which accounts for seventy percent of global usage. Cultural practices, such as conversational etiquette or the customary greeting rituals like a high five, are other common human practices that vary immensely from place to place.
The use of transport methods and adherence to various cultural norms, like wearing masks, are also broadly shared human practices that have been documented globally. Thus, while specific practices and the extent of their prevalence might vary, the underlying commonality is the adherence to collective behaviors characteristic of human culture and society.