Extinction is a natural phenomenon: After all, more than 90 percent of all organisms that have ever lived on Earth aren't alive today. But humans have made it worse, accelerating natural extinction rates due to our role in habitat loss, climate change, invasive species, disease, overfishing, and hunting.

What is the natural process of extinction?

Extinction occurs when species are diminished because of environmental forces (habitat fragmentation, global change, natural disaster, overexploitation of species for human use) or because of evolutionary changes in their members (genetic inbreeding, poor reproduction, decline in population numbers).

How would you respond to someone who says that because extinction is a natural process?

How would you respond to someone who says that because extinction is a natural process, we should not worry about the loss of biodiversity when species become extinct largely as a result of our activities? ... Species avoid competition (interspecifically) by partitioning resources and habitats among themselves.