Cultural anthropologists investigate the of different

Answergoogle earth; i believe this is the correct answer, plz check first;

Answer they are produced by collision of tectonic plates;

Answergovernment control over all imports and exports;

When a lake, river or other aquatic  system  becomes  eutrophic, it can have serious negative effects on other organisms like fish, birds and even people.if an algal bloom is so bad that it causes wide-spread death  in  the  water, the organisms that die will all sink to the bottom and start to decompose.