Fill in: incredible, natural, annual, terrestial, currents, inbuilt, spot, breeding.​

1 Aibek is addicted to TV documentaries which explore the wonders of the natural world.

2 The Lake District, which has got England's largest lake and tallest mountain, is a popular spot for hikers.

3 Unlike many marine mammals, most terrestrial mammals have got skin covered in hair.

4 It's not safe to swim in the river due to the strong currents.

5 The documentary was about penguins leaving the ocean to walk to their breeding ground across miles of ice.

6 The swans will fly south when it's time for their annual migration before the winter.

7 Bears have got an inbuilt instinct that motivates them to hibernate for the winter.

8 Have you ever seen the incredible spectacle of lights created by the Aurora Borealis?