Which principle of government has the ability of the governor to veto a law passed by the Texas Legislature?

The principle of government demonstrated by the governor's ability to veto a law passed by the Texas Legislature is called "checks and balances." This system ensures that no single branch of government becomes too powerful by allowing the executive branch (the governor) to reject legislation passed by the legislative branch (the Legislature). This interaction helps maintain a balance of power within the state government, fostering accountability and preventing hasty or potentially harmful laws from being enacted.