century - A __________________ is 100 years., migrate - When birds, fish, or animals ________________, they move from one place to another, usually during a particular season, to find a place for breeding or to find food., populate - If people or animals ___________________ an area, those people or animals live there, often in large numbers., survive - If you _________________ in difficult circumstances, you manage to live or continue in spite of those circumstances., predator - A __________________________ is an animal that kills and eats other animals (its prey)., balance - A ____________________ is a situation in which all the parts are equal in strength or importance., appears - If someone or something ______________, they become visible or come into your sight.,

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