OG详解-OG4 文法 Q30

Choice B is the best answer. The sentence emphasizes a similarity between the two ways a magnificent frigatebird acquires food, noting that neither way requires the seabird to dive into the water.
Choice A is incorrect. The sentence describes how a magnificent frigatebird captures prey without diving into water; it doesn’t emphasize a similarity between the two ways the seabird acquires food. Choice C is incorrect. The sentence notes the term used to describe one of the two ways that magnificent frigatebirds acquire food; it doesn’t emphasize a similarity between the two ways. Choice D is incorrect. The sentence describes the two ways that a magnificent frigatebird acquires food; it doesn’t emphasize a similarity between the two ways.