The purpose of fasting on Wednesdays is specifically to encourage the eating of fish, to support the fishing industry. People therefore respond differently. Some households uphold the old religious fasts during Advent and Lent, as if they are still observing the religious law; others ignore Advent but observe the Lenten fast. Still others ignore Wednesdays and just fast on Fridays and Saturdays. Why does the author use third-person point of view in this excerpt?