Explain how cancer treatments can work at the cellular rank?

Explain how cancer treatments can work at the cellular rank?
Chemotherapy prevents all cell growth (which is why ethnic group lose their hair), so that the abnormally growing cell stop producing and then radiation is introduced to murder the cells that already exist.
Cancer cell behave differently, like growing faster and taking up nutrients, so if a treatment can thieve advantage of the difference, a drug or toxin or marker can be sent to be absorbed by lone the cancer cells mixed contained by with the perfect ones. Depending on the treatment, the drug might work directly or it might make the cancer cell more adjectives to something, like radiation or toxin, that affects the total body.
At the cellular level, the ambition is to shut the errant cancer cell down.
Since most cancer cells hold certain signatures, such as irresponsibility of development, drugs hold been developed that can nought in on the cell at a certain stage of nouns, destroy them, while supposedly sparing "mature" cells. In a fail-safe world at least.
Thus the tumor is impacted, at the cellular stratum.