The correct answer is A. Necessary.
The word "necessary" means "required or essential." It is derived from the Latin word "necesse," which means "need." The word "necessary" has been in use in English since the 14th century.
The other options are incorrect because they are not spelled correctly. The word "necesarry" is missing the "s" at the end. The word "Necesary" is missing the "a" in the middle. The word "Neccessary" is missing the "r" at the end.
It is important to spell words correctly in order to be understood clearly. When you spell words incorrectly, it can make it difficult for people to understand what you are trying to say. It can also make you look unprofessional.
