Which of the following is a factor that can stop normal cells from growing?

Explanation

Contact with other cells can affect the growth of a cell through a phenomenon known as contact inhibition. When a cell comes into contact with neighboring cells, it triggers signaling pathways that inhibit further cell division. This mechanism helps maintain tissue structure and prevent uncontrolled growth. Essentially, contact inhibition ensures that cells only divide when there is sufficient space and resources available, regulating cell growth and maintaining tissue homeostasis. Loss of contact inhibition can lead to uncontrolled cell proliferation, a hallmark of cancer, where cells continue to divide even when in close proximity to other cells.