Radioactive decay follows first-order kinetics: the parent isotope abundance decreases as a concave exponential decay curve, while the radiogenic daughter isotope grows in as a complementary curve (starting at zero and asymptotically approaching the total original parent abundance), not as straight lines.
The correct depiction shows the parent isotope abundance declining along a smooth exponential decay curve (rapid initial decrease that slows over time) while the daughter...
Full option-by-option analysis available to enrolled students.