A tumour is an abnormal growth of cells that serves no purpose. They can start in any one of the trillions of cells in our bodies. Tumours grow and behave differently, depending on whether they are cancerous (malignant), non-cancerous (benign) or precancerous. Differentiate between benign and malignant tumours.

Explanation

To differentiate between benign and malignant tumors, we can outline the key characteristics of each type:

### Step-by-Step Solution:

1. **Definition**:
- **Benign Tumors**: These are non-cancerous growths that do not invade surrounding tissues or organs. They are generally localized and do not spread to other parts of the body.
- **Malignant Tumors**: These are cancerous growths that have the potential to invade nearby tissues and organs. They can spread to other parts of the body through the bloodstream or lymphatic system.

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