1.Create a Module in app/code(Example: Say_Hello). Then create a registration.php in app/code/Say/Hello/registration.php 2.Create a composer.json file for your module. 3.Create a module.xml in app/code/Say/Hello/etc/module.xml. 4.Create a InstallData.php in app/code/Say/Hello/Setup/InstallData.php(under Setup folder).For creating additional customer attribute. 5.Create a view file additional.phtml in app/code/Say/Hello/view/frontend/templates/additional.phtml to show additional field on customer registration form. 6.Create layout file named customer_account_create.xml…