What part of speech is the italicized word in the sentence below?

four score and seven years ago, our forefathers brought (forth) upon this continent a new nation conceived in liberty and dedicated to the proposition that all men are created equal.

adjective
conjunction
adverb
preposition
verb

The answer is: adverb.

The phrasal verb bring forth consists of a verb an an adverb. It means to produce or generate.

A phrasal verb is the connection of a verb plus an adverb, preposition or both.  Its meaning depends on the adverb or preposition that follows the verb. Furthermore, a single phrasal verb usually has more than one meaning.

Adverb

Explanation:

In this sentence, the word "forth" is an adverb, as it is modifying the verb "bring." An adverb is a word that modifies a verb, an adjective or another adverb. It provides more information about the verb, such as the manner, the time, or the location in which the adverb took place.

normally working animals are domesticated and ruled by a master, a domesticator (tamer), to perform basic and important functions on a farm, for example. the value used in this context is animal labor in exchange for food. it is not so much a contrast to the story told by napoleon and the pigs, since the animals of that particular farm also performed functions on the farm through domestication. the only thing is that in this case, who rules them is a pig, also an animal, but very respected, to whom the other animals lent him submission. that's about a strong relationship of dependency between animal and owner.