The thesis is the sentence your whole essay answers to. A vague one produces an essay that wanders; a factual one produces an essay with nothing to argue.
Enter your topic and the position you want to take, and this tool drafts thesis statements in several patterns — argumentative, comparative, causal and analytical — along with the tests for judging whether what you have written will actually hold an essay together.
"Nepal's remittance inflows are significant" is a fact, and an essay defending it has nothing to do. "Nepal's dependence on remittances has weakened incentives for domestic industrial investment" is arguable — a reasonable person could disagree, which means evidence is required.
The test is simple: could someone informed take the opposite position without being obviously wrong? If not, you have a topic sentence for a background paragraph rather than a thesis.
A good thesis lets a reader anticipate the structure. If yours could sit on top of five different essays, it is too broad, and the drafting will show it — you will find yourself writing whatever comes to hand rather than what the thesis requires.
Adding a "because" clause usually fixes vagueness at once. It forces you to name your reasons, and those reasons often become your body paragraphs directly.
The thesis sits at the end of your introduction, after the context and the problem have been established. Placing it first leaves the reader without the background to understand it; placing it in the conclusion means the essay was a search rather than an argument.
Expect it to change while you write. Essays drift as evidence accumulates, and a thesis that no longer matches what you argued should be rewritten to match — not the other way round. Check it against your finished draft before submitting.
Announcing rather than arguing — "This essay will discuss the effects of migration" — states a subject, not a position. Hedging so heavily that no claim survives is the other extreme: a thesis qualified into safety commits to nothing and cannot be defended or attacked.
Two claims in one sentence is the third. If your thesis contains an "and" joining unrelated assertions, you are proposing two essays, and the word count will only stretch to one of them.
It is arguable, specific, and stated in one sentence — specific enough that a reader could predict the essay's structure from it.
At the end of the introduction, after the context and problem are set up.
One sentence, occasionally two. If it needs three, it is probably two theses.
Yes, and you often should. If the essay you wrote argues something different, rewrite the thesis to match rather than forcing the essay back.
No. A question sets up the enquiry; the thesis is your answer to it.