The shaded region in South America is what physical feature?

Volcanic irruption is most likely to be violent when a) volcanoes near to the sea b) the neck of the volcano is sealed by a plug c) the lava is viscous d) the lava reaches the surface through a fissure e) the volcano is on the ocean floor

What two properties affect the density of ocean water

Describe the most likely weather conditions at indiana / ohio boarder