When a government fails to protect the unalienable rights of its citizens, it is the duty and right of citizens to create another form of government.
this statement is the declaration of independence’s
text structure.
minor premise.
conclusion.
major premise.

It would be the last option "Major premise"

Explanation:

Major premise is when  the premise of a syllogism that contains the major term (which is the predicate of the conclusion)

Major premise.

Explanation:

When a government fails to protect the unalienable rights of its citizens, it is the duty and right of citizens to create another form of government. Therefore, major premise is the Declaration of Independence’s  text structure.

the rhetoric device being used to persuade the audience is pathos.