It is crucial that the process of mitosis is error free. This is because otherwise healthy cells can o grow into giant super cells. o undergo meiosis

It is really crucial that the process of mitosis is error free, otherwise, health cells can grow into giant super cells, also known as cancerous cells.

The process of mitosis and the cycle of the cell is highly regulated so that uncontrolled division of cells do not occur. Mitotic cell division also needs to be error free so that normal daughter cells are produced.

This is why there are different checkpoints in the cell cycle and mitotic cell division itself. Without regulation and checkpoints, health cells might divide uncontrollably and form giant super cells. In reality, these cells are known as cancer cells.

More on cancer cells can be found here: link

The correct answer would be - become cancer cells.  

Explanation:

Mitosis is the procedure of cell proliferation or cell division. A cell can't live everlastingly so they either divide into two new cells through mitosis or dies. In the event that something happens to the control of mitosis, the healthy cells will separate random and these new cells, malignant growth cells, will likewise be uncontrollable. These malignant growth cells won't pass on, yet they will keep on dividing and will make tumors at some time.

Thus, the correct answer is - become cancer cells.  

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.