Why has the captial of el salvador been rebuilt several time?

Natural disasters such as earthquakes and floods.

Explanation:

The city of San Salvador, which is the capital of El Salvador, a central american country located almost at the center of central america, has been rebuilt several times through the years because it is a seismic zone that didn´t have any anti-seismic buildings preparation, as well a city that is easily flooded so it has had to be rebuilt several times because of those natural disasters.

answer is a: las

explanation:

the reason for this answer is becouse it's a plural frase which talks more then one thing