Final answer:
Enrique's conclusion that all extinctions are caused by humans and harmful to the biosphere can be critiqued by considering multiple factors contributing to extinction.
Step-by-step explanation:
Enriques conclusion that all extinctions are caused by humans and are harmful to the biosphere can be critiqued by considering multiple factors contributing to extinction. While human activities like deforestation and habitat destruction do play a significant role in the current accelerated extinction rate, they are not the sole cause of all extinctions. There are natural causes of extinctions like volcanic eruptions and meteorite impacts that have occurred throughout Earth's history.
Additionally, some species have naturally gone extinct due to changes in the environment or competition with other species. It is important to acknowledge that not all extinctions can be attributed to human influence. However, it is undeniable that human activities have greatly contributed to the current mass extinction event, and reducing our impact on the environment is crucial for the preservation of biodiversity.