Final answer:
Metastasis is the spread of cancer cells from their original site to other parts of the body.
Step-by-step explanation:
The correct answer is B. metastasis.
Metastasis is the spread of cancer cells from their original site to other parts of the body through the lymphatic system or bloodstream. It is an important characteristic of cancer and often indicates an advanced stage of the disease. For example, if breast cancer cells spread to the lungs, it is called metastatic breast cancer.
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