Final answer:
The word 'revolution' in the passage is best defined as a violent attempt by many people to end the rule of one government and start a new one.
Step-by-step explanation:
The word 'revolution' as used in the passage is best defined as c) The usually violent attempt by many people to end the rule of one government and start a new one.
The passage states that both the revolutions in Spanish America and the eighteenth-century revolution that created the United States were wars of independence that severed colonial ties. These revolutionary movements were civil wars that pitted pro-independence factions against those who fought for the continuation of the colonial connection. This definition fits the description of a revolution as a violent attempt to overthrow a government and establish a new one.