
For the first question the passage does give the quote that comparison with the large islands we can arrive at certain results but it comes with a rider
'CAN' in the beginning of statement in passage it makes the option 4 kind of restricting in its purview ..means u can use them in only that way. like in example author has used
cultural anthropologists example where the comparison is not used directly rather result of an resource abundance is given( which i feel is Fact according to author) hence it will negate option 4
i feel answer to it would be option 3 which has been reiterated over and over again in the passage.
about last question don't you people think more correct option would be 5 as it is fact (as i believe ) according to the author....