What are three reasons the signers of the declaration were compelled into action?

The continuing attempts of Parlaiment to tax the colonies (such as the Stamp Act, the Townshend Acts, and the Tea Act), the declaration by Parlaiment that the colonies were considered to be in a state of rebellion in 1775, followed by Lexington, Concord and Bunker Hill, and the gradual hardening of the position of the English Crown and Parlaiment that they would not listen to or address the crievances of the colonies, since they were subjects, and had no business complaining to the King or Parlaiment.