How to tell your landlord you lost your keys?

Well  you should just tell he landlord and hope for the best you can always change the locks but you still have to tell the landlord first.

Just explain to your landlord that lost them and hopefully he is reasonable like mine is and understands. Best of luck!

The structure or medium of the work from which the paragraph is excerpted is a speech.

I would say this because:

It is not an essay, because it uses pronouns such as I
It is not a short story, because it doesn't follow the correct format
It is not an interview, because it is someone's own opinion combined with facts, not facts that another person contributed