When At one time dinosaurs lived on Earth Today they are extinct This relates to?

This relates to the concept of extinction and the natural cycles of life on Earth. Dinosaurs thrived for millions of years during the Mesozoic Era, but they ultimately became extinct around 65 million years ago, likely due to a combination of catastrophic events and ecological changes. Their extinction highlights the fragility of ecosystems and how species can rise and fall over time. Understanding this history can provide insight into current biodiversity and conservation efforts.