A shark attack occurs when a shark bites a human, often while the person is swimming, surfing, or diving in the ocean. These incidents are rare, and most sharks do not pose a threat to humans. The majority of shark species are not aggressive and prefer to avoid contact with people. Shark attacks can be classified into different types, including unprovoked and provoked attacks. Unprovoked attacks happen without any interaction from the human, while provoked attacks occur when a person touches or harasses the shark. Understanding shark behavior and respecting their habitat can help reduce the risk of such incidents.