How do the coral reefs act as "undersea wall? "

The protect the sea animals and put up a boarder causing it to act as a undersea wall

what are local authorities doing to fix the problem

explanation: what are local authorities doing to fix the problem

the ss was the main organization responsible for the genocidal murder of around six million people of european ethnic minorities, essentially jews, in the holocaust. the members of all its branches committed war crimes and crimes against humanity during the second world war (1939-1945). likewise, the ss were involved in commercial enterprises and exploited the inmates of the concentration camps as slave laborers.

the tortures and assassinations committed by the ss were the result of an ideology developed long before the armed conflict, this ideology was based on the racial supremacy of the germans over the rest.