Amber and Courtney are sisters. Amber is the oldest and Courtney is the youngest. According to Frank Sulloway's research on birth order, how might Amber's and Courtney's personalities differ? Describe the evolutionary principle that underlies these differences.

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The Answer of Amber and Courtney are sisters. Amber is the oldest and Courtney is the youngest. According to Frank Sulloway's research on birth order, how might Amber's and Courtney's personalities differ? Describe the evolutionary principle that underlies these differences.

Amber and Courtney Are Sisters