Residents in one state vote on election day to decide whether to remove their governor from office. this is called an

Referendum

Explanation:

Referendum refers to a situation where all the people of a state or an area is asked to give their opinion or decision on an important issue.

Here residents vote on election to remove their governor. It is good to go for a referendum, rather than government decide by themselves. Referendum ensures democracy and provides a proper channel for a change.

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modern american cars are not available due to trade restrictions

the telephone is the answer