Define the term chemotherapy.

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Chemotherapy**: Chemotherapy is defined as the use of drugs to treat cancer. It involves administering specific medications that target and kill cancer cells in the body.

2. **Selection of Drugs**: The drugs used in chemotherapy are chosen based on the type and stage of cancer that a patient is diagnosed with. This personalized approach helps in effectively targeting the cancer.

3. **Mechanism of Action**: The chemotherapy drugs work by entering the body and specifically attacking cancer cells, which helps in inhibiting the spread of cancer to other parts of the body.

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