Answer the following question given this paragraph: 

Lung cancer is a disease in which the cells found in the lungs grow out of control. The growing mass of cells can form a tumor that pushes into nearby tissues. The tumor will affect how these tissues work. Lung cancer is the most common cause of cancer-related death in men, and the second most common in women. It is responsible for 1.3 million deaths worldwide every year ( Figure below ). The most common symptoms are shortness of breath, coughing (including coughing up blood), and weight loss. The most common cause of lung cancer is exposure to tobacco smoke.


Q: What do you call a growing mass of cancerous cells that pushes into nearby tissues?

 Choices:

- bacteria

- pallet

- calcium

- tumor

A:
tumor
