Which of the following describes a method the Navy employs for pollution control?

The chosen answer discusses the implementation of advanced treatment systems for waste, which reflects the Navy's commitment to environmental stewardship. By utilizing cutting-edge technology for waste management, the Navy reduces the environmental impact of its operations. Advanced treatment systems can include processes that minimize pollutants and ensure waste materials are treated effectively before disposal. This not only complies with environmental regulations but also protects marine ecosystems and promotes sustainability within naval operations.

Other choices do not align with the Navy's pollution control practices. For instance, disposing of waste at sea is generally discouraged and often prohibited under international regulations. Utilizing older, less efficient technology would likely exacerbate pollution issues rather than mitigate them. Finally, while reducing all naval activities might theoretically lower pollution, it is not a practical or effective method for managing environmental impacts in a comprehensive and responsible manner. The focus on innovation and efficiency exemplified in advanced treatment systems highlights a proactive approach to pollution control, which is essential for modern naval operations.