Which process involves the formation of bone tissue?

Ossification is the process responsible for the formation of bone tissue. It involves the conversion of a non-bone tissue into bone, which can occur through different mechanisms, including intramembranous ossification and endochondral ossification. This process is crucial during the growth and development of the skeletal system, as it allows for the proper formation and maintenance of bone structure throughout an individual's life.

In contrast, hematopoiesis refers to the formation of blood cells within the bone marrow and is not directly related to the development of bone tissue. Calcification involves the accumulation of calcium salts in tissues, which can occur in various contexts, including normal bone formation and pathological conditions, but it does not specifically refer to the process of forming the bone itself. Myositis is an inflammatory condition affecting muscle tissue and is unrelated to bone formation. Understanding these distinctions highlights why ossification is the correct answer concerning the formation of bone tissue.