Because they have the most to lose, imagine it like you have 10 towers and all collapsed from a tsunami. And the village next to you also collapses. The ten towers lost way more money and people in it then the villages
In short answer, The developed country just simply has a lot more to lose then the lesser developed one.
South America is the world leader in Hydroelectric power. Hope this helps
P-Waves travel through any kind of material whether it’s a solid, liquid or a gas
S-Waves can only move through solids and are stopped by liquids and gases
Hope this helps :)
