The second one and the last one are true; natural selection favours organisms well adapted to the environment, and is often called survival of the fittest.
Natural selection is not random, as e<span>volution is not a </span>random<span> process.</span><span> Also, natural selection can occur even if the trait is not hereditary, as the process</span><span> involves genetic mutations too.
Nature is genes. Nurture is how someone or something is grown/ raised. Scientists believe both are important, so they do not choose one over the other.