Why is the cross significant in Christianity?

the cross is the main symbol. It reminds Christians that Jesus died on the cross to save them. The dove is the symbol of the holy spirit and peace.

Explanation:

In Christianity the cross reminds Christians of God's act of love in Christ's sacrifice at Calvary—"the Lamb of God who takes away the sin of the world." The cross also reminds Christians of Jesus' victory over sin and death, since it is believed that through His death and resurrection He conquered death itself.

the answer is a. harriet tubman was a nurse on the battlefield.