The statement that best describes how the executive branch has changed over the years is "The executive branch has undergone significant transformations."
The executive branch of the United States government has evolved significantly since its inception. Initially, the executive branch was a relatively small and weak entity, with limited authority. However, over time, the power of the presidency has expanded dramatically, making it one of the most powerful branches of government.
Several factors have contributed to the growth of executive power. One factor is the rise of national security concerns, which have given the president greater authority to manage foreign affairs and conduct military operations.