Who is the head of the executive branch in Missouri?

The head of the executive branch in Missouri is the Governor. In the structure of state government, the Governor serves as the chief executive officer who is responsible for implementing state laws, overseeing the executive branch, and managing the state's administration. The Governor has the authority to appoint various officials, veto legislation, and play a significant role in the legislative process.

This position is analogous to the President at the federal level, and it encompasses a range of responsibilities such as preparing the state budget, enforcing state laws, and representing the state in various matters. The significance of the Governor's role makes them the most visible and responsible figure in the state's executive branch, leading to the conclusion that this option is indeed the correct answer.