An adaptation that helps the cactus survive in arid environments, _________
Which choice completes the text so that it conforms to the conventions of Standard English?
water evaporation is minimized by the plant's waxy skin.
the plant's waxy skin minimizes water evaporation.
the minimization of water evaporation is achieved by the waxy skin.
the arid environment is tolerated by the plant's waxy skin.
Correct Answer: B
Choice B is the best answer. The introductory phrase "An adaptation that helps the cactus survive" describes a specific physical feature. "The plant's waxy skin" is the logical subject.
Choice A is incorrect because "water evaporation" is not the adaptation. Choice C is incorrect because "the minimization" is an abstract concept, not the adaptation. Choice D is incorrect because "the arid environment" is not the adaptation.