Step 1: Understanding the Passage:
The passage discusses the role of human activity in the creation of landscapes that foster biodiversity. While human presence has traditionally been thought to harm nature, the passage reveals that human-designed environments can support a vast array of species. It highlights the long-standing role of humans in preserving biodiversity through activities like creating meadows, gardens, and forests.
Step 2: Analysis of Options:
- (1) This option aligns well with the passage, stating that human action has been as likely to increase biodiversity as reduce it. It supports the idea of human-created ecological mosaics.
- (2) While this option discusses the role of human-designed landscapes, it does not fully capture the essence of the passage that emphasizes the balanced impact on biodiversity.
- (3) This option is accurate in describing human-created landscapes but does not focus on the broader impact on biodiversity as much as option (1).
- (4) This option correctly identifies the positive impact of human action on biodiversity but does not capture the key idea that human-created landscapes support biodiversity equally to natural ones.
Step 3: Conclusion:
Option (1) best captures the essence of the passage, highlighting the balanced impact of human action on biodiversity.
The passage given below is followed by four summaries. Choose the option that best captures the essence of the passage.
In investigating memory-beliefs, there are certain points which must be borne in mind. In the first place, everything constituting a memory-belief is happening now, not in that past time to which the belief is said to refer. It is not logically necessary to the existence of a memory-belief that the event remembered should have occurred, or even that the past should have existed at all. There is no logical impossibility in the hypothesis that the world sprang into being five minutes ago, exactly as it then was, with a population that "remembered" a wholly unreal past. There is no logically necessary connection between events at different times; therefore nothing that is happening now or will happen in the future can disprove the hypothesis that the world began five minutes ago. Hence the occurrences which are CALLED knowledge of the past are logically independent of the past; they are wholly analysable into present contents, which might, theoretically, be just what they are even if no past had existed.
For any natural number $k$, let $a_k = 3^k$. The smallest natural number $m$ for which \[ (a_1)^1 \times (a_2)^2 \times \dots \times (a_{20})^{20} \;<\; a_{21} \times a_{22} \times \dots \times a_{20+m} \] is: