Intrusion refers to the act of entering a place or situation where one is unwelcome or uninvited. This can happen in various contexts, such as when someone enters a private property without permission or when a person interrupts a conversation. In the digital world, intrusion often relates to unauthorized access to computer systems, where hackers exploit vulnerabilities to steal information or cause harm. In nature, intrusion can also describe geological processes, like when molten rock, or magma, pushes into existing rock layers, creating new formations. This type of intrusion can lead to the formation of valuable minerals and can significantly alter the landscape over time. Understanding both human and natural intrusions helps us manage and protect our environments better.