Is the thesis statement at the beginning or at the end?

Write a sentence that contains the main claim you're making in your essay, and provide a warrant (reason).

Generally, it's the last, but your conclusion SHOULD NOT be a rehash of your thesis, though that is a good start. You should state why anything you've written matters, and...

You're starting with too much length on the thin end. Try experimenting with lengths to see if that helps.

To write the thesis, summarize your answer to the task question in 1-2 sentences. Your thesis should be the last sentence of your introduction.

At the end of the introduction and then again at the beginning of the conclusion. Also, the body paragraphs should all link back to the thesis.

Each process essay will require a different thesis depending on your particular topic or task. To develop your thesis, try to think about the central problem that you are trying...

A typical thesis statement is not a question. Often it is the answer to a question or prompt, in fact! However, you can consult an expert or a teacher, as...

This might be part of your thesis statement. You will want to make a statement as your thesis or claim -- so if you are answering a question you have...

They are all fine, and saying which one is best is a purely subjective. I'd go for "by the end" because it's short. "By the end" means you will have...

Yes.