Why developing countries are least able to cope with the devastating effects of tsunamis​

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.

Here is a picture  of the net. its 4 squares in a row diagonal and on the third draw one square aove and under

Why you put last one a? i think is b.