Question

a city located along the coastline is vulnerable to damage from tidal surges during storms. the city wants to implement natural barriers to help protect coastal areas from tidal flooding. which natural barrier would be most effective at mitigating the impact of tidal surges?
reinforcing sandy beaches
restoring coral reefs offshore
building lagoons along the coast
planting mangrove trees along shorelines

Explanation:

• Reinforcing sandy beaches: While sand can absorb some wave energy, it is not as effective as other natural barriers in long - term protection against tidal surges.
• Restoring coral reefs offshore: Coral reefs can break the force of waves and reduce the energy of tidal surges as the water moves over them.
• Building lagoons along the coast: Lagoons are more related to water retention and may not directly mitigate the impact of tidal surges as effectively as reefs.
• Planting mangrove trees along shorelines: Mangroves are more effective in protecting against storm - surges from tsunamis and wind - driven waves rather than tidal surges. Tidal surges are mainly due to the gravitational pull of the moon and sun combined with storm conditions. Coral reefs, by dissipating wave energy over a large area, are more effective against tidal surges.

Answer:

Restoring coral reefs offshore.