What evidence does the declaration provide for how the king has prevented laws from being passed?

In the Declaration of Independence, Thomas Jefferson presented a list of  "facts to be submitted to a candid world" to demonstrate that the British king had been seeking to establish "an absolute Tyranny over these States" (the colonial states which were declaring their independence).  

Jefferson's list included items such as:

... The king refused to assent to laws that were wholesome and necessary for the public good.

... The king had forbidden colonial governors to enact laws or implement laws without his assent (which, as the prior point noted, he was in no hurry to give).

... The king forced people to give up their rights to legislative assembly or forced legislative bodies to meet in difficult places that imposed hardships on them.

... The king dissolved legislative assemblies and then refused for a long time to have other assemblies elected.

... The king obstructed justice in the colonies and made judges dependent on his will alone for their salaries and their tenure in office.

... The king kept standing armies in place in the colonies in peacetime, without the consent of the colonial legislatures.

There were more items listed by Jefferson, but those are some of the ways he listed in objection to how the king blocked proper laws and governance in the colonies.

true.

hope this !

racism and segregation.