Answer:
Summary: The last major wave of human immigration to Mars consists of the elderly, among them Lafe LaFarge and his wife Anna, who are still experiencing grief over the death of their son, Tom, years before. To Lafe's shock, Tom appears to visit them one night in their new home on Mars.
Explanation:
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Using sadness or tragedy to get one's point across. IE, the humane society commercials.
I don’t entirely understand your question
