As this question is a 6 marker, and the mark scheme does not specific the need for place specific details, you do not need to add them, but you could use them to support your answer.
3 example of human activity could include:
-> Tourism (wildlife/landscapes/culture)
-> Mineral exploitation (this is only in the Arctic)
-> Scientific research
An example of a well-developed idea:
There are no official restrictions on mining in some of the areas of the Arctic as the countries there have their own priorities and agendas. This has led to pollution, such as oil spills, which have contaminated the water, making it hard for the indigenous people and wildlife who depend on the ocean for food. The reduction in biodiversity would disrupt the food chain and puts some species at risk of becoming extinct.