What is lung cancer?

i will mark brainliest for the correct answer​

Lung cancer is cancer that starts in the lungs. When a person has lung cancer, they have abnormal cells that cluster together to form a tumor. Unlike normal cells, cancer cells grow without order or control, destroying the healthy lung tissue around them. These types of tumors are called malignant tumors

Cigarette smoking is the number one risk factor for lung cancer.

Explanation:

precisely the author keeps the interest of readers not describing clearly the   kind of relationship in giselle's family. by doing this, readers had to imagine and assume how it was.   instead, the author described better scenes with dark star and the influence of books about horses in giselle's life and actions.   also the fact that she broke her arm but not referring to it in detail leads the readers to imagine and guess what could have occurred.

creating amino acids is the answer