Question

the main, or central, idea of the passage is working as a union scout and spy, harriet tubman played an important role in a union army raid. how does the detail in bold develop the main idea? harriet tubman is famous for her role as a \conductor\ on the underground railroad. while her work as a scout and spy for the union army during the civil war is not as well known, it is no less heroic. one of her most important military successes occurred when union forces were preparing to raid a confederate - held area along the combahee river and destroy the souths supply routes. the confederate army had hidden mines throughout the waters, endangering the union soldiers, but tubman found a way to bypass this hazard. knowing that the mines had been placed by enslaved people forced to work for the confederates, she led a secret mission into enemy territory and convinced the enslaved workers to divulge the mines locations. armed with this information, tubman was then able to guide union gunboats safely past the mines during the raid. the union soldiers not only successfully raided the confederate supplies but also freed more than 700 enslaved people along the way. it demonstrates the lasting legacy of tubmans bravery. it emphasizes the risks faced by enslaved people in the confederacy. it describes how tubman helped ensure the safety of the union soldiers.

Explanation:

The bold - faced detail shows that Tubman found out the location of mines placed by the Confederates and guided Union gunboats safely past them, which directly relates to ensuring the safety of Union soldiers during the raid. It is about her actions in helping the Union military operation, not about her lasting legacy or the risks of enslaved people as the main focus.

Answer:

It describes how Tubman helped ensure the safety of the Union soldiers.