Which of the following best defines the central claim a paper aims to prove?

• A. Hypothesis
• B. Conclusion
• C. Observation
• D. Thesis

Answer: (D)

The central claim a paper aims to prove is its thesis—the main argument or claim the whole work is built to support. In academic writing, the thesis is a specific, debatable statement that the author intends to argue with evidence, reasoning, and analysis throughout the paper. Everything that follows is organized to defend and elaborate that claim.

This differs from a hypothesis, which is a testable prediction often used in scientific experiments rather than the overarching argument of an essay. It differs from a conclusion, which is the result you reach after analyzing evidence. It also differs from an observation, a factual detail you notice or record, not the claim you’re trying to prove.

So, the best definition is that the central claim is the thesis—the main, defendable claim the paper is written to establish.