Citizenship Form Question

[immihelp]

While filling up citizenship form i would like to clarify below
points kindly help me i am holding greencard for 4years 9months and continuiously residing in usa.

1)is it neccessary to register selective service option-and is it
neccessary to mention in application

2)what are the documents i have to submit along with the form

[immihelp]

1. Read https://www.immihelp.com/register-for-selective-service-in-usa/
2. Read
https://www.immihelp.com/us-naturalization-document-checklist/