Review the details below.
• Tundra swan parents lead their young to feeding sites in the water, where the adults
bring up submerged food.
• If adult tundra swans are threatened by predators-especially humans, bears, or
wolves-they may leave their nests to draw attention away from their young.
• Tundra swans breed on the Arctic tundra in North America and must protect their
chicks from the cold by building nests made of grasses and moss.
Choose the best topic sentence to introduce a paragraph containing these details.
Tundra swan parents keep their chicks warm and help them search for food.
Adult tundra swans use several strategies to protect and nurture their young
in the Arctic.
The Arctic tundra's unique environment makes it a challenging place to raise
offspring.