Final answer:
The claim about the domino effect of extinction is true. Extinctions impact ecosystems, and the current mass extinction is largely due to human actions. Biodiversity loss threatens ecosystem services vital to human well-being.
Step-by-step explanation:
The statement about the domino effect of extinction on ecosystems and the circle of life is true. Extinction can cause a ripple effect where the loss of one species may lead to further loss of biodiversity. The health and survival of ecosystems are deeply intertwined with the biodiversity within them, and human actions have led to the current sixth mass extinction. Evidence suggests that global climate change, pollution, and habitat destruction are major causes of the accelerated extinction rates we're experiencing. The extinction of keystone species, for example, can disrupt entire ecosystems. It is thus crucial for human welfare and health to protect biodiversity, as it underpins ecosystems that provide essential services and resources.