Final answer:
The most effective source for researching lions would be a National Geographic article on their habitat.
Step-by-step explanation:
The most effective source for Luis' research on lions would be a National Geographic article on the habitat of lions. This source would provide accurate and reliable information about the natural environment and behavior of lions. It is a reputable source known for its high-quality content and expertise in wildlife.
The video clip of lions interacting with humans at a zoo, although interesting, may not offer comprehensive information about lions' natural habitat and behavior. The newspaper article about the Detroit Lions football team is unrelated to the subject and would not provide any useful information for Luis' research. Similarly, the online movie review of The Lion King, while related to lions, is not a credible source for gathering factual information about real-life lions.
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