Question

which two changes could protect a local subway system that often experienc
waterproof sealing
adding more lights
more seating areas
elevating entrances
installing solar panels

Explanation:

Waterproof sealing can prevent water from entering the subway system, protecting it from water - related damage. Elevating entrances can reduce the risk of water flooding into the subway during heavy rain or other water - related events. Adding more lights, more seating areas, and installing solar panels do not directly address the protection of the subway system from the problems it often experiences (assuming the main problem is related to water ingress).

Answer:

waterproof sealing, elevating entrances