Which period involved a major extinction event that included the dinosaurs?

W) Between the Paleozoicic and Mesozoic eras

X) Between the Phanerozoic and the Precambrian eras

Y) Between the Mesozoic and Cenozoic eras

Z) Between the Precambrian and Paleozoic eras
Y) BETWEEN THE MESOZOIC AND CENOZOIC ERAS