What is the word whom used for in a sentence?

He saw the faces of those whom he loved at his birthday celebration.

She saw a lady whom she presumed worked at the store, and she asked her a question.

Here dwells an old woman with whom I would like to converse.

'Whom' is used in place of who, and i like to use it as shown in the last one, unnecessarily and to add more words to the text, and to make it sound more put together.

Your welcome,

Theadosia, your friend from hell.

a. inform

explanation:

"how to" tells us that it will explain how to, which means to inform