What is fibrosis?

Fibrosis refers specifically to the abnormal formation of fibrous tissue in the body. This process involves the buildup of collagen and other extracellular matrix components, resulting in the stiffening or thickening of tissues. It often occurs as a response to injury or inflammation, where the normal healing process causes excessive scarring.

This can happen in various organs, not just the lungs, which is why the wording surrounding fibrosis is crucial. Other incorrect options focus on different conditions, such as the increase of fat tissue or deficiencies in connective tissue, which do not accurately represent the meaning of fibrosis. The emphasis of fibrosis as a condition related to fibrous tissue makes option B the most appropriate choice.