An ecosystem is joined by thousands of species, if a problem occurs causing a species to become extinct, it may not affect the proper functioning of the ecosystem initially, but as more and more species are removed, the ecosystem becomes dangerously weak over a period of time. Which hypothesis gave this sentence?

• A. Old planetesimal hypothesis
• B. Oparin-Haldane hypothesis
• C. New planetesimal hypothesis
• D. Rivet popper hypothesis