xvda refers to root device of an Amazon EC2 instance , Root Device is similar C; Drive which Contain program file of normal System need to Run, Whether iam Correct ?

Compared to Normal Storage, EBS can be easily Resize, Whether iam Correct

Yes..compared to physical storage..EBS cloud staorage can be expanded easily and it is flexible storage

Compared to Normal Storage, EBS can be easily Resize, Whether iam Correct

What is EBS ?

in Running state Volume Permanent its get rooted in EBS & IN Hibernate State only the volume is permanent