Read the following paragraph and answer the question that follows. The most __________(i)__________ respect in which ideas have helped mankind is numbers. There must have been a time when homo sapiens was a very rare species, subsisting precariously in jungles and caves, terrified of wild beasts, having difficulty in securing nourishment. At this period the biological advantage of his greater intelligence, which was cumulative because it could be handed on from generation to generation, had scarcely begun to outweigh the disadvantages of his long infancy, his lessened __________(ii)__________ as compared with monkeys, and his lack of __________(iii)__________protection against cold. In those days, the number of men must certainly have been very small. The main use to which, throughout the ages, men have put their technical skill has been __________(iv)__________ the total population. I do not mean that this was the intention, but that it was, in fact, the effect. If this is something to rejoice in, then we have occasion to rejoice.
In the above passage identify the missing words. The table below contains possible words for each blank. Choose one word from each column for the 4 blanks.

The correct answer is: