What is an advantage of using fuel-efficient vehicles for mail delivery?

Using fuel-efficient vehicles for mail delivery primarily leads to a reduction in operating costs and environmental impact. Fuel-efficient vehicles consume less fuel, which lowers the overall fuel expenses for the mail delivery service. This reduction in fuel consumption also leads to decreased greenhouse gas emissions and pollutants, contributing positively to environmental sustainability.

Additionally, the use of vehicles that are designed to be more fuel-efficient aligns well with modern practices emphasizing cost-effectiveness and environmental responsibility, making it a pragmatic choice for mail carriers. While other options may suggest benefits such as increased speed or capacity, they do not directly relate to the primary advantage of fuel efficiency. In contrast, the impact on operating costs and the environment is a significant factor for both the organization and society at large.