What can cause a gap in the rock record    a. erosion b. lack of rock deposition c. both erosion and lack of rock deposition d. neither erosion nor lack of rock deposition

answer: "life, liberty and the pursuit of happiness" is a well-known phrase in the united states declaration of independence. the phrase gives three examples of the "unalienable rights" which the declaration says have been given to all humans by their creator, and which governments are created to protect.

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in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.