Final answer:
Galapagos is not a territory in Canada, it is actually a group of islands belonging to Ecuador. However, Yukon and Nunavut are both territories within Canada.
Step-by-step explanation:
The territory that is not part of Canada among Yukon, Nunavut and Galapagos is the Galapagos. The Galapagos are a group of islands that belong to the country of Ecuador and is located in the Pacific Ocean. They are known for their unique wildlife and being the location of Charles Darwin's research leading to the theory of evolution.
On the other hand, both Yukon and Nunavut are territories within Canada. Yukon, in the western part of the country, is bordering Alaska, while Nunavut, in the Northeast, came into existence in 1999 following a division from the Northwest Territory.
Learn more about Canadian Territories