Final answer:
A physician can use physical examination and imaging tests to identify a cancer's stage.
Step-by-step explanation:
A physician can use physical examination and imaging tests to identify a cancer's stage. Physical examination involves the physician examining the patient's body for any signs or symptoms of cancer. Imaging tests, such as X-rays, CT scans, and MRIs, allow the physician to visualize the cancerous growth and determine its size, location, and if it has spread to other parts of the body.