Natural selection is the process by which organisms inherit advantageous traits, and tend to reproduce more successfully than other organisms.
a. true
b. false

True. This was the basic tenet of Charles Darwin. It is survival of the fittest. The natural selection process ensures that the weak members or traits of organisms are removed so that only the strong will remain. This ensures that the organisms and their descendants will live for as long as possible. This is the process by which organisms evolve to allow for higher survival rates. For example, an animal that is covered by thick and multiple layers of fur is made for the extremely cold climates. However, if the world begins to get warmer and warmer, such animals and their offspring will begin to have thinner and thinner layers of fur. This will allow their specie to survive longer. 

C- a hypothesis or d- an observation