i am afraid it is not correct. the correct answer should be. váží si někoho?
That is accepted. However, "respektuje" is completely correct.
On se vari nekoho what's wrong here?
vařit se means to boil (The water is boiling). I do not understand what exactly you meant.
i guess vari vs vazi
I see, yes, "Váží si někoho?" is possible. "On si někoho váží?" is possible too and some more orders. "On si váží někoho?" is quite strange.
Why is 'Někoho si váží?' not accepted?
Because it hasn't been added yet. The word order is um... unusual, but possible. You can use the report button ;)