Final answer:
A veto is the power to reject a bill, while a pocket veto is when a bill is indirectly vetoed by not signing it. A line item veto allows the executive to reject specific parts of a bill.
Step-by-step explanation:
A veto is the power of a president or governor to reject a bill passed by the legislative body. It is a way for the executive branch to influence the lawmaking process. A pocket veto occurs when the president or governor indirectly vetoes a bill by simply not signing it and letting it expire. Finally, a line item veto is the power of the executive to reject specific parts of a bill without vetoing the entire legislation.
Learn more about differences between veto, pocket veto, and line item veto