Reading up to chapter 6, the reader can formulate that most of Darwin's hypotheses derive from the idea of ​​variation. He discusses that trait abundance and adaptations are the main factors that often separate one species type from another. It then provides justification for how exactly species have changed over time. We later learn from Darwin that differences in organisms often become more visible within domestic groups and even species found throughout the physical world. The difference in colors, formations and organs along with body traits all distinguish an abundance of unique species from each other. Genetics is the tool that allows variations to form, and in his Origin of Species, readers can see that Darwin argues that traits are the important aspects that run from parents to offspring. In my opinion, what seems significant about Darwin's variations is the clever way they allow species to adapt and live effortlessly in the natural world. Specifically in chapter 4, Darwin's focal point is the deepening of natural selection and the laws of variation, but according to his own mechanism. It fascinates its readers and helps them understand the importance of the influence of different types of selection, as well as the strong dependence between wild organisms and their surrounding environment. Furthermore, in chapter 4 Darwin states that: "It may, therefore, be thought improbable, given that variations useful to man have undoubtedly occurred, that other variations useful in some way to each being in the great and complex battle of life, should sometimes occur over thousands of generations? If this happens, can we doubt (remembering ... half of the paper ... and the laws of variation but according to its mechanism. It fascinates its readers and helps them understand the importance of the influence of different types of selection as well as the strong dependence between wild organisms and the surrounding environment. In conclusion, most of Darwin's hypotheses that I have read so far stem from the idea of ​​variation, traits and adaptations being the main factors. which often separate one type of species from another. Superficially in chapter 4 he formulates a focus and delves into natural selection and the laws of variation but according to his mechanism he fascinates his readers and helps them understand the importance of the influence of different types of selection as well as the strong dependence between wild organisms and the surrounding environment.