One factor that enabled the growth of independent colonial government in British North America was the...

Difficulty of exercising control of a government from a distance.

Explanation:

Establishment of independent colonies in North America was made possible due to the physical factors. For British Government, it was difficult to control colonies in North America from distance.

When colonies began to develop in North America, British government allowed Governors of newly established colonies to self-govern the colonies till they match with the laws of England, the mother country.

The colonizers began settling in North America with the aim to enjoy religious freedom and thus the King also permitted colonizers to have political independence as it was impossible to exercise control over the colonies from such a great distance.

no statements but ok.

the statement that best describes the idea of manifest destiny that was used in the 19th century would be that "it was fate that the united states would continue to  expand westward," since people thought the us was "destined" to do so. 

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.