Correct Answer: INESSENTIAL

Solution : The third option is the correct choice.

Indispensable: It denotes something necessary.

Inessential: It denotes a thing that is not necessary.

The meanings of the other options are as follows:

• Fundamental: It means something of central importance.
• Crucial: It denotes extremely important.
• Basic: It denotes forming the part of something that is most necessary and from which other things develop.