I was wondering if this is possible with this system?

I wanted to make a survey to tally how many people use a specific body in the game Second Life... However there are MANY different kinds and I dont know them all. Is there a way to make it so that if when presented with a multiple choice question and their body isnt list... that they choose other and after it is submitted it will add that particular body to the rest of the multiple choices?

Thank you for writing to us!

Is there a way to make it so that if when presented with a multiple-choice question and their body isn't list... that they choose other and after it is submitted it will add that particular body to the rest of the multiple choices?

Yes, it is definitely possible in Jotform. I can see that you have used "Single Choice Properties" in the form: https://www.jotform.com/200221277619046. Here we have the option to edit the form after the form is submitted. 

You as the form owner can edit the form entries via form submissions page, see the next guide.

Guide: How to Edit Submissions Made on Your Forms

It is also possible to email the form users with the submission edit links so that your user can also edit the form after the submission.

Guide: How to Let Users Update Their Form Submissions at a Later Date

Hope this helps! Let me know if you need any additional assistance.

Regards.

Oh sorry I meant if somebody adds something to the other field it will automatically edit the form and add that particular response they gave for others to see it as a choice.

I believe you want to add User Contributed dropdown in the form:

https://www.jotform.com/widgets/user-contributed-dropdown

This widget allows your form users to add an option to your drop down field.

It is easy to configure, and easy to use - when your form users click on add option a dialog will pop out so that they can type in the new drop down option.

Thanks.