Question

which is a factual statement that cannot be changed or replaced? hypothesis scientific theory scientific law observation

Explanation:

A hypothesis is an educated guess and can be revised. A scientific theory is well - supported but can be refined. An observation is what is seen or measured and can be misinterpreted or updated. A scientific law describes a fundamental relationship in nature and is a factual statement that cannot be changed or replaced in its core form.

Answer:

scientific law