Question

The Cenozoic era saw the rise of
a reptiles
b mammals
c amphibians

Answer 1

The Cenozoic era saw the rise of **b mammals**. This era, which began about 66 million years ago, is often referred to as the "Age of Mammals" because it is marked by the significant diversification and dominance of mammals following the extinction of the dinosaurs at the end of the Mesozoic era.