Galapagos Islands

(1) The Galapagos Islands are located around 600 miles to the west of Ecuador, a country in South America. (2) These islands were first discovered in 1535. (3) They were named in Spanish as "Isolas de Galapagos," which meant the "Islands of the Tortoises," from sailors' accounts of a large number of tortoises inhabiting the isles.
(4) These islands are home to active volcanos, meaning the volcanos here can erupt at any time. (5) Volcanic eruptions created the archipelago, or a group of islands, which forms the Galapagos. (6) They are a collection of sixteen islands scattered over an area of 36,000 square miles near the equator. (7) Each of these major islands was created from a single volcanic eruption.
(8) The Galapagos Islands have a unique and diverse variety of life forms. (9) Therefore, they have been called the "living laboratory" of evolution. (10) They are home to many life forms that are endemic, which means they are not found anywhere else on Earth. (11) The animals here show no fear of humans. (12) The marine iguanas, giant tortoises, and flightless cormorants prove the evolutionary change they underwent to adapt themselves to the unique ecosystem. (13) Although all the islands share similar volcanic composition, environment, and climate, each isolated isle has its own unique set of animals and plants. (14) These islands played an important role in helping Charles Darwin explore and develop the theory of evolution.
Which sentence in paragraph 3 needs to be removed?
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(12) The marine iguanas, giant tortoises, and flightless cormorants prove the evolutionary change they underwent to adapt themselves to the unique ecosystem.
(10) They are home to many life forms that are endemic, which means they are not found anywhere else on Earth.
(11) The animals here show no fear of humans.
(9) Therefore, they have been called the "living laboratory" of evolution.

The sentence that needs to be removed is sentence (12) "The marine iguanas, giant tortoises, and flightless cormorants prove the evolutionary change they underwent to adapt themselves to the unique ecosystem."