What does the term “Karel's world” refer to?

The term "Karel's world" refers specifically to the grid-like environment where Karel operates. This environment is designed as a two-dimensional plane that Karel navigates in order to complete various tasks and challenges. Within this world, Karel can move forward, turn, pick up or put down beepers, and interact with walls and other objects that may be present. Understanding Karel's world is fundamental to programming Karel effectively, as it allows users to visualize the space in which Karel must perform actions and progress through different programming challenges. The other options focus on elements related to the programming and functionality of Karel, but they do not define the overarching environment in which these actions take place.