The coastline of Australia comprises the coasts of mainland Australia and Tasmania
there are fewer clouds in this layer, making Commercial jet aircraft fly in the lower stratosphere to avoid the turbulence which is common in the troposphere below. The stratosphere is very dry; air there contains little water vapor. Because of this, few clouds are found in this layer; almost all clouds occur in the lower, more humid troposphere. a much smoother ride overall.airplanes fly in the stratosphere is because this is where the least amount of turbulence is found.
The correct answer is - a) slump.
The slump is a geological occurrence that happens when a larger consolidated mass, usually composed of rocks, moves down, or falls down, a steep slope as one large mass. The movement or falling of the material is relatively short, and it can be only few ten meters, or few hundred meters. The slumps occur suddenly, usually without any warning sign, apart from the loud cracking noise few seconds before the material moves or falls down.
I think it's C, volcanoes.
If i'm wrong sorry.
