Hurricane katrina is arguably an effect : a. an increase of living creatures and crowded habitats b. environmentalism c. global climate change d. unforseen factors

Hurricane Katrina is an effect of C. Global Climate Change.

Due to global warming, warm winds with high speed showed a strong impact on United States coast. Along the coast, typically coastal cities are below sea-level. These are protected by the defense walls called Levees.

With the high-speed winds, huge waves are generated pushing the water levels around the city, New Orleans in 2005. Despite the defense walls, high-end waves lashed the sea-port. New Orleans, Louisiana were the most damaged cities after the hurricane. This left a legacy of death and destruction in United States history.

in an absolute  monarchy, the  monarchrules as an autocrat, with absolutepower  over the state and government — for example, the right to rule by decree, promulgate laws, and impose punishments. the  monarch isnominally sovereign but the electorate, through their legislature, exercise political sovereignty.