Final answer:
The power to veto laws under the Northwest Ordinance of 1787 was held by the governor, who was appointed by the Confederation Congress.
Step-by-step explanation:
Under the Northwest Ordinance of 1787, the power to veto laws passed by the legislature was held by the governor appointed by the Confederation Congress. Initially, the territory with fewer than 5,000 white adult males would be governed solely by a governor and a three-judge panel, appointed by Congress. Once the population reached between 5,000 to 60,000 inhabitants, a legislature could be formed, but the appointed governor still maintained veto power. Full self-government, including an elected governor with the power to veto, would only be established upon reaching a population of over 60,000 white male inhabitants and following admission as a state.