How do fossils support the theory of evolution?

• A. They show changes over time and similarities among species, evidence of extinct species, and past environments.
• B. They prove fossils are the only evidence of evolution.
• C. They show fossils have no relation to living organisms.
• D. They indicate that all species exist today as they did in the past.

Answer: (A)

Fossils provide a record of life across different times, showing how organisms have changed, how they are related, and what environments they lived in. By studying fossils in the order they appear in rock layers, we can see a progression from simpler to more complex forms and the appearance and disappearance of species over long spans of time. This demonstrates descent with modification, a hallmark of evolution. The similarities in bone structures and other features between ancient fossils and living organisms point to common ancestry, while the presence of extinct species in older rocks shows that life has changed rather than stayed the same. Fossils also reveal past environments, helping explain why organisms had certain adaptations. Dating fossils places these changes on a timeline, making the pattern of evolution clear. So fossils support evolution because they document change over time, reveal relationships among species, show extinct forms, and reflect ancient environments. The other statements don’t capture these multiple lines of fossil evidence.