Select the word or phrase that is redundant and can be removed without changing the meaning of the text. New research suggests that plain female birds once had plumage that was as colorful and multihued as that of male birds today.

The phrase "and multihued" can be considered redundant and removed. It simplifies the sentence to "New research suggests that plain female birds once had plumage that was as colorful as that of male birds today." This maintains the meaning while cutting out unnecessary repetition. If you're crafting a sentence, aiming for clarity is key. Look for phrases where adjectives or descriptions overlap. In this case, "colorful" and "multihued" convey similar ideas, so choosing just one streamlines your writing and enhances readability!