Step 1: Word meaning.
"Nourishment" means the food and other substances necessary for growth, health, and good condition.
Step 2: Spellings check.
(A) Norishmant: Wrong, missing "u" and ending incorrect.
(B) Noeurishment: Incorrect extra letters.
(C) Nourishment: Correct spelling.
(D) Nuerishmant: Wrong order of vowels and ending.
Step 3: Conclusion.
Correct spelling is (C) Nourishment.