It is a package of services which includes Office 365, alongside other business tools.

It is the cloud storage service which is connected to your Microsoft account.

It is a classic program used to create text documents which can include formatting, images, and various publication options.

It is a spreadsheet program which can be used to store and format data, create charts, and run calculations based on available values.

It allows users to create presentations on a slide by slide basis.

A desktop application allows you to sign into your email address(es) in order to manage and store your email from your desktop.

An app that is capable of storing text, images, and formatting.

A user can subscribe to Office 365 without also subscribing to Microsoft 365, but all Microsoft 365 users will also have access to Office 365.

You cannot store your Office 365 documents in OneDrive.