Question 1

Sentence 4 contains irrelevant information and should be deleted from the passage.

While sentence 4 discusses the edibility of certain weeds and their use in food or herbal medicine, it does not contribute to the main focus of the passage, which is the impact of weeds on crop yield and the development of herbicide resistance.

A) Sentence 4

Sentence 4 is irrelevant to the primary topic of the passage, which centers around the challenges posed by weeds to crops and the implications of herbicide use. The mention of edible weeds distracts from the discussion on how weeds compete for resources and develop resistance to glyphosate.

B) Sentence 6

Sentence 6 is pertinent to the topic as it highlights the significant impact that a single ragweed plant can have on crop yield. This information illustrates the seriousness of weed competition, reinforcing the passage's main theme of weed management in agriculture.

C) Sentence 8

Sentence 8 provides relevant context regarding the development of glyphosate-resistant crops and the associated benefits of using glyphosate for weed control. This is crucial for understanding the evolution of herbicide use and its effects on farming practices.

D) Sentence 11

Sentence 11 is relevant as it discusses the global issue of certain weed species developing resistance to glyphosate. This contributes directly to the passage's focus on the challenges that farmers face regarding weed control and the implications for crop production.

Conclusion

Sentence 4 is the only option that introduces information unrelated to the main discussion about the adverse effects of weeds on crops and herbicide resistance. All other sentences provide essential insights into the relationship between weeds and agricultural practices, which are critical for understanding the broader context of the passage.