The recipe called for one-third of a cup of flour, but i accidentally put in three cups. why does one-third contain a hyphen in this sentence? i need the answer pls

My science teacher explained how the weather cycle works using an illustration. which is the best revision of this sentence?

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

Rewrite the sentence, using colloquial speech. what are you doing later?