I can't solve the task in this tutorial because I don't have the "Related Contacts" choice and a few others are missing too if I compare what I have with what is shown on the website.
https://developer.salesforce.com/trailhead/en/getting_started_crm_basics/admin_intro_accounts_contacts/admin_intro_accounts_contacts_relationships

I ma new to salesforce. Can anyone please tell what exactly is a sales process and i twould be of great help if you can provide relavent documents.