Could you me with this question and page

Why did thales choose water as the "primeval stuff", what us this "primeval stuff"

Hello, i need you to me my teacher sent me a letter to the reader and in the letter i have to put in. why do i want to get 3 points? and he said that of the 4 arguments choose one and that with that argument write the letter these are the arguments: addition: also that, even that, too. comparison: more than, less than, as much as. opposition: but, however. security: without a doubt, of course. those are the 4 arguments and i have to choose just one, i need it it's very urgent you it's about language and literature

Does anybody know what this says? in english?