Final answer:
The best title for the information in the box is "Factors Influencing Colonial Autonomy."
Step-by-step explanation:
The best title for the information in the box would be "Factors Influencing Colonial Autonomy". This title accurately reflects the content of the passage, which discusses the growing power of the colonial assembly in relation to the governor, as well as the political control the colonies had over their affairs. The passage also mentions two factors that contributed to the habit of self-government in the colonies, which ultimately influenced their autonomy.