Human behavior refers to the range of actions and reactions exhibited by individuals in response to various stimuli. It encompasses everything from simple actions, like smiling or frowning, to complex behaviors, such as forming relationships or making decisions. Factors influencing human behavior include emotions, social interactions, and cultural norms, which shape how people think and act in different situations. Understanding human behavior is essential for many fields, including psychology, sociology, and marketing. By studying these behaviors, researchers can gain insights into why people act the way they do, helping to improve communication, foster better relationships, and create effective strategies for engaging with others.