2. During which of these divisions has almost all the noticeable evolution of life occurred?​

The correct answer to this open question is the following.

Unfortunately, you forgot to include the divisions to properly answer the question on your terms.

Although you forgot to attach the divisions we can help you to answer this question based on our knowledge about the topic.

Almost all the noticeable evolution of life occurred during the Mesozoic, and Cenozoic.

The Mesozoic era appeared after millions of years of the Paleozoic era. The Paleozoic era included the periods called Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian.

The Mesozoic era included the following periods: Triassic, Jurassic, and Cretaceous. The Cenozoic era included the Tertiary and Quaternary periods.

After dinosaurs' mass extinction, practically all the noticeable evolution of life occurred during the Mesozoic and Cenozoic(also known as the age of the mammals.)