Evolution, in its simplest form, answers the question of how life on Earth has changed over time. It explains how species diversify, adapt, and develop new traits through the processes of natural selection, genetic variation, and inheritance.

Here's a more detailed breakdown:

* How did life on Earth originate? While evolution doesn't explain the origin of life itself, it does provide a framework for understanding how life diversified and evolved from its earliest forms.

* Why do species look different? Evolution explains the diversity of life by showing how different species have adapted to their environments through the process of natural selection.

* Why do organisms share similarities? Evolution explains that all living things share a common ancestor and have inherited traits from that ancestor, resulting in shared characteristics.

* How do new species arise? Evolution explains the process of speciation, where populations become isolated and evolve separately, eventually leading to the formation of new species.

* Why do some species go extinct? Evolution explains that species that fail to adapt to changing environments are more likely to go extinct.

It's important to note that evolution is a scientific theory, not a belief. It's supported by an immense body of evidence from various fields like paleontology, genetics, and biology.

Overall, evolution provides a comprehensive framework for understanding the history of life on Earth and the incredible diversity of life we see today.