A symbol of the Eucharist because it represents life. It is also a symbol because the breaking of the bread, was performed by Jesus so now we accept the bread as the body of Jesus.
A symbol of Eucharist because just like the bread it was shared at the passover meal between Jesus and his Disciples. The wine is given to us as the blood of Jesus, wine also symbolizes joy.
A symbol of Eucharist because white is used as the christian color for baptism. White symbolizes purity and clean of sin.