Do landslide is caused by the slop of a terrain? ?

Question

instead that, what else can caused landslide? do no plant above is the main cause?

Answer 1

With landslides there are 2 factors(Stabilty & Trigger event).

Things like groundwater, vegetation cover, surface erosion etccan cause a slope to become unstable and the trigger events such as a earthquake will cause the slope to fail.

Answer 2

A landslide is due to a steep slope usually triggered by an earthquake or heavy rain.