Answer: Mitosis.
Explanation : Mitosis is the process in which a eukaryotic cell nucleus splits in two, followed by division of the parent cell into two daughter cells. The word "mitosis" means "threads," and it refers to the threadlike appearance of chromosomes as the cell prepares to divide.
(2) They stimulate uncontrolled cell division is your answer. This causes cancer, specifically for lungs, lung cancer.
Because we are moving with it at the same speed but because that isn’t an answer choice it is probably C
I think it is b because it is a result of an environmental influence