What is the evolutionary process leading to the formation of a new species?
a. microevolution
b. the apex of natural selection
c. macroevolution
d. molecular evolution

c. macroevolution

Explanation:

Macroevolution can be define as the evolutionary change on a large scale. This results in origin of evolutionary trends, mass extinction, origin of new species, or taxonomic group. When small microevolutionary changes accumulate in the new members of the same species, which results in the development of species different from the old species. The new species will no longer be able to breed with the old species. This process leads to macroevolution.  

your answer is "the 1950's"

b. the carbon cycle ensures living things have a source of hydrogen