Answer: Oxygen Isotopes!
Explanation: I just took the quiz and I got it correct!
Thomas Malthus was an English scholar and cleric who was known for his views in political science and demography (study of population). His views suggested that population would outpace food the supply of food and that the only vital parameters of population growth were famine, war and diseases. His writings on demography were influential in shaping the economic thinking.
Answer: the pioneer species
Explanation: