Identify the object of the preposition in the sentence below. Inventions are made around the world.

a. Inventions

c. world

b. around

d. are

A preposition is a word that relates or connects a word to another word, phrase or clause. It usually precedes a noun or a pronoun. In the given sentence above, the preposition is the word "around". It precedes the noun "world". Therefore, the correct answer is option b.