The author uses facts to develop the argument. The information provided about wolf pack sizes, the age at which pups can play, and the average litter size are all factual statements.
Use the passage to answer the question
A wolf pack may have as many as twenty wolves. By three weeks of age, wolf pups are able to play. Most packs are led by an adult male and adult female. The average size of a wold litter is around four pups.
Which type of evidence does the author use to develop an argument?
Statistics
Expert opinion
Testimonials
Facts
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