Question

how does the evolution of living being in nature

Answer 1

The evolutionary history of life on Earth traces the processes by which both living organisms and fossil organisms evolved since life emerged on the planet, until the present. Earth formed about 4.5 billion years (Ga) ago and evidence suggests life emerged prior to 3.7 Ga.[1][2][3] Although there is some evidence to suggest that life appeared as early as 4.1 to 4.28 Ga this evidence remains controversial due to the non-biological mechanisms that may have formed these potential signatures of past life.[1][4][5][6][7] The similarities among all known species of present-day organisms indicate that they have diverged through the process of evolution from a common ancestor.[8] It is estimated that more than 99 percent of all species, amounting to over five billion species,[9] that ever lived on Earth are extinct.[10][11] Estimates on the number of Earth's current species range from 10 million to 14 million,[12][13] of which about 1.9 million are estimated to have been named[14] and 1.6 million documented in a central database to date.[15] More recently, in May 2016, scientists reported that 1 trillion species are estimated to be on Earth currently with only one-thousandth of one percent described.

Answer 2

evolution in human being take place because they change Themselves time to time &they get gradual change in their bodies