Which two credits specifically focus on indoor water use reduction in LEED?

The correct answer highlights two specific credits found in the LEED rating system that are directly aimed at reducing indoor water consumption.

The "Indoor Water Use Reduction" credit is designed to encourage projects to consider water-efficient fixtures and appliances, ultimately leading to significant reductions in water usage. This credit sets specific standards for water use reduction compared to the baseline established by the LEED rating system, effectively promoting efficient water management practices within buildings.

Additionally, the mention of "Water Efficiency" encompasses various strategies that can be implemented to achieve overall better water management in a building, including but not limited to indoor water reduction. This credit encourages projects to pursue not just the minimum standards but to seek innovative solutions to reduce water use across all aspects of the building's operations.

Together, these credits emphasize the importance of managing and reducing indoor water use, aligning with LEED's broader goal of sustainability and efficient resource use in the built environment.

In contrast, the other responses include credits that do not solely focus on indoor water use. For example, fixture efficiency tackles specific elements within the broader context of water use, while categories like graywater management and irrigation address water management strategies beyond just indoor consumption.