Evidence of prior negotiations, prior agreements, or contemporaneous oral agreements that contradict or vary the terms of a written contract may not be introduced into a trial. this is known as:

Parol evidence rule.

Explanation:

Parol evidence rule is the regulation that restricts the presentation of any evidence while oral contract before the existing period negotiation that can tend to manipulate, alter or contradict the terms mentioned in the written contract .

This law usually comes into action when some particular terms and expression of contract is being determined or completed. This rule is implied because it can change the contract or agreement when it has already reached the final stage. This law is followed in Anglo-American region.

the earth’s crust is broken into separate pieces called tectonic plates (fig. 7.14). recall that the crust is the solid, rocky, outer shell of the planet. it is composed of two distinctly different types of material: the less-dense continental crust and the more-dense oceanic crust. both types of crust rest atop solid, upper mantle material. the upper mantle, in turn, floats on a denser layer of lower mantle that is much like thick molten tar.

each tectonic plate is free-floating and can move independently. earthquakes and volcanoes are the direct result of the movement of tectonic plates at fault lines. the term fault is used to describe the boundary between tectonic plates. most of the earthquakes and volcanoes around the pacific ocean basin—a pattern known as the “ring of fire”—are due to the movement of tectonic plates in this region. other observable results of short-term plate movement include the gradual widening of the great rift lakes in eastern africa and the rising of the himalayan mountain range. the motion of plates can be described in four general patterns:

collision: when two continental plates are shoved together

subduction: when one plate plunges beneath another (fig. 7.15)

spreading: when two plates are pushed apart (fig. 7.15)

transform faulting: when two plates slide past each other (fig. 7.15)