Final answer:
Charles Darwin's original hypothesis that organisms evolved by natural selection became an important scientific theory due to supporting evidence from diverse fields of study.
Step-by-step explanation:
Charles Darwin's original hypothesis that organisms evolved by natural selection became an important scientific theory due to supporting evidence from diverse fields of study.
Scientists such as Georges Cuvier and Jean-Baptiste de Lamarck made observations and developed theories that contributed to the understanding of evolution. Darwin's extensive travel and observations provided further evidence for his theory.
Since Darwin's time, scientists have gathered even more evidence supporting the theory of evolution, including fossils and studies on genetic inheritance.