Answer:
To introduce facts that prove the tyranny and usurpations of rights that the King of Great Britain has established.
Step-by-step explanation:
The author begins the paragraph indicating how the colonials have suffered within the monarchical regime of Great Britain, on account of the king who encourages usurpations, disrespect and injuries to the colonies. To confirm that this was not the author's own opinion, he states To prove this, let the Facts be submitted to a candid world, "which introduces the idea that he will present real facts that confirm his position in relation to the king aa Great Britain.