The correct option is C
A calendar of various events in the Earth's history is called the geologic time scale. The geological time scale is a chronological measurement system that is related to the study of the rocks and their strata. The fossils found in various strata of rocks provide the chief means of establishing a geologic time scale. This information can be used by geologists, palaeontologists or other scientists to understand and describe the relationship between time and events that took place in Earth’s history. The geological time scale includes various intervals of time. These units of time are called eras and periods.
The various eras include the Paleozoic era, Mesozoic era and Cenozoic era.
The Cenozoic era is the latest era or the current era in which we are living. The Cenozoic era has seen the emergence of mammals and has been mostly dominated by different kinds of mammalian species. It is also known as the age of mammals.
The Mesozoic era is dominated by reptiles; hence it is also called the age of reptiles. This era also witnessed the extinction of reptiles. Almost all modern phyla of plants and animals were established in this era.
The Paleozoic era is called “the cradle of ancient life.” Different types of plants and animals lived in both water and on land in this era. The fossil records of this era reflected the progression of different plants and animals. The fossils of first vertebrates appeared late in this era.
Each era is again divided into periods. For example: Triassic, Jurassic and Cretaceous periods belong to the Mesozoic era.
The evolution took place in different eras and their respective periods are represented in the picture below.