Read the sentence. what is the object preposition? the brown dog chewed on the rawhide bone

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The object preposition in the sentence; The brown dog chewed on the rawhide bone is ON.

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the development of trade during the middle age increased to the change given in the agriculture, which gave money, industry and markets a bigger importance in economy. the agriculture production was more than the consumption, which meant the creation of wider markets out of the areas. besides, with the end of multiple wars, the population increased and new trade routes were created.

being surrounded by crimes, poverty, and failing schools as well as his own lack of confidence in his abilities.