Which ministry oversees environmental compliance related to vehicles?

The Ministry of Environment is the correct answer because it is specifically mandated to oversee and enforce environmental regulations related to various sectors, including vehicles. This ministry focuses on ensuring compliance with environmental laws that pertain to emissions and pollution controls, which are critical in the automotive industry. The regulations they implement help to reduce the environmental impact of vehicles through monitoring and managing exhaust emissions, waste disposal, and other environmental concerns.

In contrast, the Ministry of Transportation primarily focuses on the infrastructure and safety of transportation systems, while the Ministry of Consumer Services deals with consumer protection and services. The Ministry of Municipal Affairs focuses on municipal governance and local issues. Therefore, when it comes to environmental compliance specifically related to vehicles, the Ministry of Environment is the appropriate authority.