Which system is eligible for EAc4: Renewable Energy?

Tidal energy conversion is a qualifying renewable-energy generation technology, making Option A correct. USGBC renewable-energy guidance identifies wave and tidal energy among eligible renewable systems. By contrast, combustion of municipal solid waste is specifically excluded as an eligible renewable-energy source. Ground-source heat pumps improve energy efficiency by transferring heat to or from the earth, but LEED distinguishes this from qualifying geothermal renewable-energy generation; vapor-compression ground-source heat-pump systems are treated as efficiency strategies rather than renewable-energy production. Passive solar design and daylighting similarly reduce building energy demand but do not generate qualifying renewable energy for EAc4. LEED v5 EAc4 rewards qualifying renewable-energy supply or procurement, and tidal generation fits the renewable-resource principle while the other three options do not meet the credit ' s renewable-generation definition.