Question

why is biodiversity important?
a) is extinction a natural process? explain.
b) what caused mass extinction millions of years ago?
c) what is the main cause of extinction in the past 10,000 years?

Explanation:

a) Extinction is natural as species face environmental changes, competition, and predation over time. For example, dinosaurs went extinct due to a large - scale environmental event like an asteroid impact.
b) Mass extinctions millions of years ago were often caused by major environmental changes such as volcanic eruptions, climate change, and sea - level fluctuations. For instance, the Permian - Triassic extinction was likely due to massive volcanic activity.
c) In the past 10,000 years, the main cause of extinction has been human activities. This includes habitat destruction for agriculture, urbanization, and logging, over - hunting, and the introduction of invasive species.

Answer:

a) Extinction is a natural process because species are constantly adapting to changing environmental conditions. When these changes occur too rapidly or are too extreme, species may not be able to adapt in time, leading to extinction.
b) Mass extinctions in the past were caused by major environmental upheavals such as large - scale volcanic eruptions that could change the climate and atmospheric composition, or asteroid impacts that led to global cooling and disruption of ecosystems.
c) In the past 10,000 years, human activities have been the main cause of extinction. This includes deforestation, over - exploitation of species, and the introduction of non - native species that outcompete native ones.