How did the spartan government train the boys to be tough?

One way the boys were trained to be tough is by giving them no comfort.

During the time they believed that the country should have a strong military and that a military society created more obedient and loyal citizens.

So when they turned 8 years old, Spartan boys were taken from their mothers to go to training. They would learn many things like how to fight, the importance of stealth and pride for their country.

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racism and segregation.

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation: