q1.q2: According to the narrative in Genesis Chapter 11 of the Bible, the Tower of Babel was a tower built by a united humanity to reach the heavens. Because the hearts of men were said to be inherently evil and disobedient, they were striving to make a name for themselves instead of worshipping the God who created them. Because of this open defiance, God stopped their efforts by confusing languages so that the builders could not understand one another. As a result, they could no longer communicate and the work was halted. The builders were then scattered to different parts of Earth. This story is used to explain the existence of many different languages and races. The tower of Babel never got close to being finished.
q.3 --There were more than one sign given during the post-flood period. Clarrification is needed.
q.4.In the Bible, the Sabbath is a weekly religious day of rest as ordained by one of the Ten Commandments: the third by Eastern, Roman Catholic and Lutheran numbering, the fourth by other Protestants. The Hebrew word ("šhabbat", שַׁבָּת, Strong's H7676) means "the [day] of rest (or ceasing)", as it entails a ceasing or resting from labor. The institution of the Old Testament Sabbath, a "perpetual covenant ... [for] the people of Israel" was in respect for the day during which God rested after having completed the Creation in six days: Genesis 2:2-3, Exodus 23:12, 31:16-17, Isaiah 56:6-8.
q.5 What Law? Are you referring to the ten commandments? If so, then its egypt.