Why would scientists set off a underground explosion

Consider darwin's first writings on the theory of natural selection. an important point of darwin's essay on the principle of population, written in 1798, was a peer's observation that in nature plants and animals produce far more offspring than can survive, this observation can be attributed to a) charles lyell. b) thomas malthus. c) jean-baptiste lamarck. d) johann friedrich meckel.

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000

Ineed / the answer on this question you!