Krill are tiny blank that penguins eat.
Understand the Problem
The question is asking what krill are in relation to their role as a food source for penguins, specifically looking for the missing word that describes krill.
Answer
crustaceans
The final answer is crustaceans.
Answer for screen readers
The final answer is crustaceans.
More Information
Krill are tiny crustaceans that constitute a significant part of the diet for smaller penguin species.
Sources
- Penguin declines may come down to krill - Science News - sciencenews.org
- Penguin Facts For Kids – Penguin Fun Facts | SeaWorld Orlando - seaworld.com