Read the passage: 'Migratory whooper swans rely on shallow coastal bays as staging posts during spring migration, feeding on underwater eelgrass beds to rebuild fat reserves before nesting in subarctic bogs.' What critical resource do the coastal bays provide for the swans?
Answer and explanation
Correct answer: B. Abundant food supplies to replenish energy reserves for migration
- Step 1: The swans feed on eelgrass in the bays to replenish fat reserves needed for their migration and breeding. Step 2. Select abundant food supplies to replenish energy. Answer: Abundant food supplies to replenish energy reserves for migration. Why not the others: Swans do not nest in trees; coastal bays are shallow and cold, not geothermal springs; swans do not feed in deep trenches.
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