การอ่าน TOEFL

📖 เนื้อเรื่อง

❓ คำถาม According to the passage, what is the primary reason the keystone species concept has been criticized?

A. A) It focuses too heavily on predator-prey relationships.
B. B) It is difficult to empirically identify keystone species with certainty.
C. C) It overestimates the role of herbivores in ecosystem stability.
D. D) It fails to account for the effects of ecosystem engineers.

✅ คำตอบที่ถูกต้อง

B) It is difficult to empirically identify keystone species with certainty.

TOEFL Reading Tips

Skim the questions first, underline keywords, then locate in the passage
Watch for paraphrasing; correct answers are often reworded
Infer vocabulary meaning from context, not just memory
Base inferences on the passage; avoid over-extrapolation
Manage time: about 18 minutes per passage

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