I believe the answer is B, the survival of the fittest due to competition for resources. Survival of the fittest is a term that originated from Darwinian evolutionary theory was a way of describing the mechanism of natural selection. The biological concept of fitness is defined as reproductive success. Many organism overproduce to increase chances of survival for their organisms due to competition.
So if you take the 12 hours that it takes to fill the swimming pool 3/5 way then u divide 12 by 3 and you would get 4 which would mean each quarter took 4 hours then it would take 8 more hours to fill the rest of the swimming pool
Clean coal technology refers to a gathering of technologies being created in order to reduce the environmental influence of coal energy production and to mitigate global climate change. There are three distinct technological procedures accessible for the aim of capturing carbon as demanded by the clean coal concept:
1. Pre-combustion capture: This includes gasification of a feedstock like coal to generate gas that may be shifted to develop a mixture of carbon dioxide and hydrogen gas, from which the carbon dioxide can be effectively separated and captured, transported, and eventually sequestered.
2. Post-combustion capture: This is the capturing of carbon dioxide from the exhaust gases of combustion methods.
3. Oxy-fuel combustion: The fossil fuels like coal are combusted in a mixture of oxygen and recirculated flue gas, rather than in air that hugely withdraws nitrogen from the flue gas allowing capturing of low-cost and efficient carbon dioxide.
An initial example of a coal-based plant utilizing carbon capturing technology is a Swedish company Vattenfall's Schwarze Pumpe power station situated in Germany.