medium · SAT Reading & Writing

Many 19th-century naturalists believed that the bright colors of certain tropical birds served primarily to attract mates, a theory popularized by Charles Darwin. ______ Alfred Russel Wallace argued that these vibrant hues often functioned as a form of camouflage, allowing the birds to blend into the dappled sunlight and iridescent foliage of the canopy.

1. Consequently,
2. Notably,
3. In contrast,
4. Similarly,

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