Correct Answer: A

Rationale: When students use inference, they are able to make logical assumptions based on contextual clues found in the text. This involves reading between the lines and drawing conclusions that are not explicitly stated. Choice B is incorrect because it refers to the skill of navigating through different types of text independently, which is not specifically related to inference. Choices C and D are also incorrect as they refer to summarizing and paraphrasing a text's main idea, which are different skills from making inferences.

Correct Answer: B

Rationale: The author distinguishes between different groups of insects based on their habitat, categorizing them into aquatic and aerial categories. The passage mentions how some insects spend time under water while others live in the air, emphasizing the distinction between aquatic and aerial habitats. Therefore, choice B is correct. Choices A, C, and D are incorrect because the passage does not focus on describing the specific characteristics, adaptations, stages of development, or environments of the insects, but rather on their habitat and lifestyle.

Correct Answer: A

Rationale: The correct answer is A. Given the alliances and tensions at the time, the assassination was simply the trigger in an already volatile situation, making war highly likely. Choice B is incorrect because the alliances and existing tensions would likely have led to a conflict even without the assassination. Choice C is incorrect as it wrongly implies that only these three countries were involved in the conflict. Choice D is incorrect as Austria alone starting the war doesn't consider the broader context of alliances and power dynamics among the world powers.

Correct Answer: A

Rationale: The author's purpose in discussing aquatic insects in relation to those that spend their entire lives in the air is to emphasize the adaptability and complexity of insect life cycles. The author highlights how some insects transition between aquatic and aerial environments, showcasing the diverse strategies and features these insects possess to thrive in different habitats. Choice B is incorrect because the author is not solely comparing aquatic insects with those that remain airborne, but rather exploring their adaptability. Choice C is incorrect as the focus is not on highlighting unique features but on showcasing the transition between environments. Choice D is incorrect as the author is not questioning the validity of studying insects in only one environment but rather demonstrating the fascinating dual-life cycles of certain insects.

Correct Answer: A

Rationale: The correct answer is A because the passage primarily discusses certain insects that spend time in water during their early stages and then transition to an aerial life when they reach adulthood. It highlights how these insects, such as Stoneflies, May-flies, and Dragon-flies, live in water initially and then in the air during their adult stage. This central idea is best captured by choice A. <br> Choice B is incorrect because while the passage mentions gills as a part of the respiratory system of aquatic insects, it does not delve into entomology as a field. Choice C is incorrect as it does not solely focus on defining insect respiration but rather on the transition of certain insects between aquatic and aerial environments. Choice D is incorrect as the passage does not explicitly invite readers to participate in insect preservation efforts; it mainly focuses on describing the life cycle of specific insects.