Read the excerpt from "Killer Whales and Great White Sharks.”Both killer whales and great white sharks are predators that kill other animals for food. But these two predators hunt in very different ways.

The sentence compares killer whales and great white sharks, then signals a contrast: they are both predators, but they hunt differently. “But” correctly introduces that contrast. “And” or “both” would not show the difference, and “very” does not fit the sentence’s meaning.

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