Where do earthquakes occur most often and why?

Hi there!

Earthquakes most often occur on fault lines and on edges of tectonic plates. This is due to the plates moving, causing the earthquakes. In the US, most earthquakes occur in midwestern and eastern areas

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Ithink d would be correct

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.