Explain can you vertically scale an Amazon instance? How?

Yes, you can vertically scale on Amazon instance. For that

• Spin up a new larger instance than the one you are currently running
• Pause that instance and detach the root webs volume from the server and discard
• Then stop your live instance and detach its root volume
• Note the unique device ID and attach that root volume to your new server
• And start it again

AWS Certification