Which function is called at the start of a game in CodeHS?

The function that is called at the start of a game in CodeHS is start(). This function plays a crucial role in initializing the game environment and setting up key elements that are needed for the gameplay to commence. When the game is executed, start() is automatically invoked to handle this initial setup, ensuring that all necessary components such as graphics, controls, and variables are properly configured and ready for the player to interact with.

While there may be other functions like initialize() that suggest a similar purpose, they might not be specifically designated to be called at the very start of the game. This is why start() is the correct choice, as it is specifically intended for this initial phase, allowing all game mechanics and event listeners to be activated properly from the outset.