Why is Hardy regarded as a naturalistic writer in English litera

Why is Hardy regarded as a naturalistic writer in English literature? Discuss in relation to his novels you know.
【正确答案】：A. He read Darwin's The Origin of Species and accepted the idea of survival of the fittest;
B.He was also influenced by Spencer's The First Principle, which led him to the belief that man's late is predeterminedly tragic, driven by a combined force of "nature";
C.the outside nature is shown as some mysterious supematural force...
D.Man proves impotent before Fate...
E.Discuss in relation to his novels. In his works, man is shown inevitably bound by his own inherent nature and hereditary traits which prompt him to go and search for some specific happiness or success and set him in conflict with the environment. (Tess, Jude the Obscure, etc.)