How can you render a text on a page using only layout xml?

What order operation is available in the My Account section in the storefront?

You added a plugin declaration to MyCompany/MyModule/etc/di.xml:

What will be the effect of this declaration?

How do you pass an array ['one', 'two] as a parameter to you block using the layout XML arguments directive?

There are two different configurable products which both share one variation. The shared variation is represented by the same simple product.
A customer added both configurables to the cart with the same selected variation?
How will they be displayed?