B. Natural selection
Natural selection is the most important force of evolution. Other forces of evolution are mutation, gene flow and genetic drift.
The process that happens in the given statement above is the chemical evolution. The chemical evolution allows cells to generate where as when time prolongs or goes on, complex molecules are being created in which they came from simple molecules. They are being created because of the reactions that occur chemically, generating or evolving them as time goes by.
Do you have an image of the diagrams?
The answer is responsiveness.
