Which event sparked the protest movement known as the arab spring?

free speech was declared illegal in iran.
ayatollah khomeini became the ruler of iran.
a young man tragically killed himself in tunisia.
the six states of the arabian peninsula united.

The event that sparked the protest movement known as the Arab Spring was that a young man tragically killed himself in Tunisia.

Explanation:

The protests in the Arab world of 2010-2013, known as the Arab Spring, were a series of popular demonstrations claiming for democracy and social rights organized by the Arab population.

The beginning of these demonstrations is marked on December 17, 2010 in the City of Tunis, when a street vendor (Mohamed Bouazizi) was stripped of his merchandise and savings accounts by the police, and in response he immolated himself as a protest.

During its agony thousands of Tunisians rebelled against the government to which the country was subjected, causing a domino effect in the rest of the Arab nations. Since 1987 Zine el Abidine Ben Ali ruled Tunisia with authoritarian methods. The Tunisians, faced with the Bouazizi situation, went out to protest against Ben Ali. Mohamed Bouazizi passed away on January 4, 2011. Ten days later, President Ben Ali resigned. The example of Tunisia was imitated in the rest of the Arab world.

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