Question

In the quick condition,

		Groundwater flows rapidly from a landfill to a stream
		The fluid pressure is really small, causing landslides
		The weight of buildings is greater than the land surface can hold, causing them to lean
		The effective stress is really small, and soil grains no longer touch

Answer 1

Quick condition is the condition of soil

In quick condition upward water pressure and water flow reduce the effective pressure ( applied effective pressure is so small) ie soil is no longer touch (cohesiveness) so option 4 is correct