D) organisms that possess overall characteristics best suited to their environment .
Explanation:
Darwin's Theory of Evolution is the generally held idea that all life is connected and has plummeted from a typical progenitor: the flying creatures and the bananas, the fishes and the blossoms - all related. Darwin's general hypothesis presumes the improvement of life from non-life and stresses a simply naturalistic (undirected) "drop with change". That is, mind boggling animals develop from increasingly oversimplified precursors normally after some time. Basically, as irregular hereditary transformations happen inside a life form's hereditary code, the useful changes are safeguarded on the grounds that they help survival - a procedure known as "matural selection."
Charles Darwin used the word "Natural Selection" which is best represented in answer D.) organisms that possess overall characteristics best suited to their environment. <span />