He won fifth place in the lottery. It is his 10th already this year.
--> It is his 10th win already this year.
Reasons (of hair loss) can range from the simple&temporary - a vitamin deficiency - to the more complex, like an underlying health condition
--> can range from the simple&temporary ones to the more complex ones
In each case, the first sentence is what I read in the article and the second ones with the bold part are what I feel like they should be written. I feel like both sentences need nouns, so if I'm guessing right(?) they are omitted in the sentence.
But I'm not sure when to omit them and when not to.
Can I just omit them when what it indicates is clear? so it depends on the writer?