The translation says: An agitation against the makers of the infuriated her that night, he
that would imply the fact that he made history with his LAWS of physics so the answer is LAW
You can take "in fact" out of the sentence to help with determine what type of sentence it is because it's a prepositional phrase. This leaves us with "Only a small percentage of Southern Africa is desert" which is a simple sentence.
Would you post what the poem is ?