Answer;
-Organisms had adapted to new environments, giving rise to new species
From his observations of organisms in the galapagos islands, darwin reasoned that organisms had adapted to new environments, giving rise to new species.
Step-by-step explanation;
-On his visit to the Galapagos Islands, Charles Darwin discovered several species of finches that varied from island to island, which helped him to develop his theory of natural selection.
-He noticed that each finch species had a different type of beak, depending on the food available on its island. The finches that ate large nuts had strong beaks for breaking the nuts open.