The devastation from the tornado amounted to million which best identifies the preposition and the object of the preposition in the sentence

In this sentence we can identify a prepositional phrase "from the tornado" which in this case acts as an adjective since it is modifying the noun "devastation". Within the prepositional phrase, the preposition is the word "from" and the object of that preposition is the noun "tornado".

Prepositional phrases are a group of words that consist of two parts: a preposition and an object. They can function as adjectives when modifying nouns, as in this example, or they can also function as adverbs when modifying a verb, adjective or another adverb.