Because there are several species of animals there that don't exist anywhere else in the world.
Darwin.
Charles Darwin
Geographic isolation of a common ancestral species of finches
"When Charles Darwin studied plants on the Galapagos Islands" is the complete subject.
Charles Darwin
Darwin was puzzled about the many adaptations of the finches on the Galapagos Islands
Charles Robert Darwin
Some examples of species that have evolved due to geographic isolation include the Galapagos finches, Hawaiian honeycreepers, and the marsupials of Australia. Geographic isolation can lead to the development of distinct traits and adaptations in isolated populations over time, eventually creating new species.
Darwin was puzzled about the many adaptations of the finches on the Galapagos Islands
Darwin discovered that the finches were once the same species. Due to isolation, each island produced variations of the original finch species.
On his trip to the Galapagos Islands, Darwin determined that animals on the islands
Charles Darwin went to the Galapagos Islands.