The sacco and vanzetti trial revealed the power of which of these?

 The correct answer is :  of public labor unions.

Explanation:  The Sacco-Vanzetti trial symbolized fears of red fear. During the red scare immigrants like Sacco lied to the police because they feared they were deported to their home country. Many people in the United States supported Sacco and Vanzetti because they thought they had not had a fair trial. These two Italian immigrants were accused of robbery in a factory where the security guard died. Despite protests in Europe over his conviction, they were finally executed in the electric chair.

- a.) african slaves and indentured servant’s

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this forms a narrow, steep sided inlet (sometimes deeper than 1300 metres) connected to the sea. the terminal moraine pushed down the valley by the glacier is left underwater at the fjord’s entrance, causing the water at the neck of the fjord to be shallower than the main body of the fjord behind it.