People performing this activity first witnessed the lost Tikhvin Icon of the Mother of God appearing in the air. This activity is depicted on a ring that is destroyed by cardinals after the death of each Pope since it is used as a seal. In Matthew 13 (“chapter 13”), the wicked are thrown into a blazing furnace in a parable that compares the creation of the Kingdom of Heaven to this activity. In Luke 5 (“chapter 5”), the sons (-5[1])of (*) Zebedee witness a miracle involving this activity. (10[1])After arriving in Capernaum, Jesus asks two brothers to figuratively perform (10[1])this activity on mankind. In order to pay a temple tax, Jesus performs a miracle so that Peter finds a four-drachma coin while performing this activity. For 10 points, Andrew and Peter had professions based around what activity on the Sea of Galilee? ■END■ (10[2])