British astronomer edmund halley was the first to calculate a comet's orbit effectively. identify the appositive or appositive phrase. astronomer edmund halley a comet's orbit calculate

Edmund Halley is the appositive in the sentence.

An appositive is a noun or noun phrase that renames another noun right beside it. The appositive may be a short or long combination of words.

In this case, the apossitive "Edmud Halley" renames "the British astronomer" previously mentioned in the story.

In addition to this, nonessential appositive is always placed in the sentence between commas.

the answer is slaves

douglas was a slave who turned into a statesman and he refused to celebrate the 4th of july until all slaves were emancipated or set free.

c hydrophobia is the answer