The correct option for the sentence is
B. drought-resistant. Let's break down why this is the best choice and why the other options are less suitable.
Step-by-Step Explanation
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Understanding the Context: The sentence discusses the need to plant trees in arid zones to combat desertification. This implies that the trees must be able to survive in conditions where water is scarce.
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Analyzing the Options:
- A. drought-resisting: This term suggests that the trees can resist drought conditions, but it is not commonly used in English. The phrase "resisting" implies an active process, which is less appropriate in this context.
- B. drought-resistant: This term means that the trees are capable of surviving periods of drought without significant harm. It is a well-established term in environmental science and agriculture, making it the most appropriate choice.
- C. drought-effective: This term is not standard in this context. "Effective" usually refers to the ability to produce a desired effect, but it does not specifically convey the idea of survival during drought conditions.
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D. drought-proof: While this term suggests that the trees can withstand drought without any negative effects, it is often seen as overly optimistic. No tree is truly "proof" against drought; they can be resistant but not immune.
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Why B is Correct:
- "Drought-resistant" is the most accurate term because it describes trees that have adaptations allowing them to survive in dry conditions. This includes features like deep root systems, waxy leaves, or the ability to store water.
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The phrase fits grammatically and contextually within the sentence, making it clear that the focus is on the trees' ability to endure drought.
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Why the Other Options are Weaker:
- A. drought-resisting: This is less common and does not convey the same meaning as "drought-resistant." It sounds awkward and is not the standard term used in environmental discussions.
- C. drought-effective: This option does not relate directly to the survival of trees in drought conditions. It could imply that the trees are effective in some way during drought, but it lacks clarity and specificity.
- D. drought-proof: This term can be misleading. It suggests that the trees will not be affected by drought at all, which is unrealistic. All plants have limits to their drought tolerance.
Summary of Key Points
- The correct answer is B. drought-resistant because it accurately describes trees that can survive in arid conditions.
- "Drought-resisting" is less common and awkward; "drought-effective" is vague; and "drought-proof" is misleading.
- Understanding the nuances of these terms is crucial for effective communication in environmental science.
Revision Summary
- Correct Option: B. drought-resistant
- Meaning: Trees that can survive drought conditions.
- Other Options: A (awkward), C (vague), D (misleading).
- Importance: Choosing precise language is essential in environmental discussions.