A dinosaur egg is a fossil. So is petrified wood.
'So' is a conjunction that depicts comparison between subjects in a sentence in this case. The use of 'so' in this sentence is incorrect because when comparing two subjects, which in this case are dinosaur egg and petrified wood, they should be in one sentence idea. When using the punctuation mark period '.' it ends the idea of the sentence in the first sentence given.
Ozymandias thought so highly of himself that he had this statue built with that inscription to intimidate anyone who might come near it. He meant for it to be a warning to not try and invade or attack, the despair part is meant to be the person despairing because they could never be as great as Ozymandias.
The meaning is twisted though, as the statue crumbles with time showing that all leaders -- especially those who value themselves so highly--will fall.
I believe that it would be Climax, because the climax is when the plot is revealed