Does EC2 have a relation with S3

Question

I created an Instance so does it use S3 services also? Where and why is S3 used for the creation of EC2? Please explain.

Answer 1

Yes, Amazon EC2 is used jointly with Amazon S3 for instances with root devices backed by local instance storage. By using Amazon S3, developers have access to the same highly scalable, reliable, fast, inexpensive data storage infrastructure that Amazon uses to run its own global network of web sites. In order to execute systems in the Amazon EC2 environment, developers use the tools provided to load their AMIs into Amazon S3 and to move them between Amazon S3 and Amazon EC2.

Source:- AWS EC2 Documentation.