How does the precession of earth's axis if rotation affect the seasons

In the diagram below, ab and bc are tangent to o. what is the measure of

In which horizon of soil profile is prevent material usually found

Liquefaction is a. a quicksand-like condition arising in some wet soils during earthquakes. b. flooding caused by tsunamis. c. flooding of coastal areas due to tectonic subsidence. d. flooding caused by dam failure resulting from an earthquake.