lessons of the book the observation of children

Explanation

The given question where the blank to be filled in is: ‘lessons of the book ________ the observation of children’. Let us take a look at the complete sentence. Prospective teachers should constantly correlate the lessons of the book ________ the observation of children at work in the school. We come across the word ‘correlate’ in the sentence. The word ‘correlate’ is a verb that always takes the preposition ‘with’ and not any other preposition. Until and upon are totally meaningless here according to the context of the sentence. We will never say ‘correlate from’. It is ‘correlate with’.