Question

review the details below.
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.
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.
choose the best topic sentence to introduce a paragraph containing these details.
adult tundra swans use several strategies to protect and nurture their young in the arctic.
tundra swan parents keep their chicks warm and help them search for food.
the arctic tundras unique environment makes it a challenging place to raise offspring.

Explanation:

The details mention building nests (protection), leading to feeding sites (nurturing), and drawing predators away (protection). The first option encompasses all these aspects (strategies for protection and nurturing). The second option only covers warmth and food (nurturing - partial). The third option focuses on the environment (not the swans' actions).

Answer:

Adult tundra swans use several strategies to protect and nurture their young in the Arctic.