Apple maggot flies are thought to have evolved from hawthorn flies by sympatric speciation. Hawthorn flies are native to North America. They lay their eggs in the berries of the hawthorn bush. The eggs hatch into maggots and the maggots develop into adult flies. Which row of the table represents sympatric speciation? The shapes shaded dark grey represent the original species and the shapes shaded light grey represent the new species. (1)

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