There are no factors listed to choose from.
They were different because they were based on one god
Other laws in other regions were based around the idea of multiple gods so there were laws for various gods, agricultural, judicial, and similar things. The ten commandments were based around a single god which usually meant that it applied to everyone equally since they weren't followers of a whole pantheon and their differences.
Factor 1: Who decides to run for office and what advantages candidates have over one another.
Factor 2: Incumbency. Usually the incumbent (the person already serving in the office) has a large advantage over challengers, unless negative events have the voters wanting to get rid of incumbents.
Factor 3: The way congressional districts are drawn. There have been court cases recently about "gerrymandering" -- attempts by a party in power to draw district boundaries in ways that will serve to perpetuate that party's power.
A sentence that uses both give words is:
<span>The Constitutional Convention is a compromise that involves proportional agreements.
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I hope that this is the answer that you were looking for and it has helped you.