WORDS given in the OPTIONS: seeksIn search of somethingratedto be rated to mark performanceincreasesTo multiplyenvisagesTo conceive or see something in one's MIND or to have a mental picture of especially in advance of realization ACCORDING to the meanings of the given words, it is clear that only 'envisages' gives a MEANINGFUL sense in all of the four sentences. Thus, the correct option is 4 and therefore the answer.