Final answer:
The form of cancer associated with a high metastasis rate and predominantly caused by smoking is 1)lung cancer, with smoking being the most significant risk factor and leading to DNA mutations in lung tissue.
Step-by-step explanation:
The type of cancer that has a high rate of metastasis and is primarily caused by smoking cigarettes is lung cancer. Smoking is the most significant risk factor for this disease, with chemicals in tobacco smoke causing damage to the lung tissue. Over time, this damage can lead to mutations in the DNA of the lung cells, eventually culminating in the development of cancerous tumors.
Lung cancer is known for its tendency to spread rapidly through the body, a process known as metastasis. As cancer progresses, malignant cells may detach from the primary tumor and travel through the blood or lymphatic system, establishing new tumors in other organs. This is a key characteristic that makes lung cancer highly aggressive and difficult to treat once it has spread. The best prevention method remains the cessation of smoking to reduce one's risk of developing lung cancer. The answer is option 1.