Answer:
The California Gold Rush sparked a movement west, which only further ignited manifest destiny. People saw the opportunity to stake a claim of their own and truly pursue the "American Dream" out west. This new discovery and the abundance of wealth to be had further solidified support of Polk's decision to move westward.
Explanation:
Thermal Convection, ridge push and slab pull are believed to be the
processes that cause plate tectonics to move.
Thermal convection is a process when the core of the Earth’s heat is
transferred to Earth’s surface by mantle.
Ridge push is when the mantle wells upward
due to convection and raises the edge of spreading oceanic plates. Since the
plates are higher at the spreading center, they are forced downhill because of
gravity as a result, the ocean floor is flatten.
Slab pull is the part of tectonic plates’
motion which can be accounted for through its subduction.
Answer: Extraordinary assumption
Explanation: Appraisal could be defined as the estimation or evaluation of an object, property or structure in other to determine either the worth, condition or nature of such property or object.
An Extraordinary assumption during appraisal means a presumption that certain unknown information exists or is a fact. It assumes a condition which is unknown to be true and as such if the information is found to be false may alter the result or conclusion of the appraisal.
Such is the scenario above, when the appariser assumes there is no leakage or contamination based merely on unknown fact.
