The natural events that most frequently result in the loss of lives and property are
a. tornadoes.
b. landslides.
c. volcanoes.
d. floods.

The answer is the magnetosphere.

Ibelieve the answer is c. map projections.hope my answer has you : )

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.