That's history not health
Answer: d. A secretary smokes a cigarette in a crowded break room.
Explanation:
An external costs can be define as the activity which is likely to disturb the nature or cause harm to a living being. d. is the correct option because of the fact that if the secretary smokes a cigarette the smoke likely to disturb the crowd in the break room as some people may feel suffocated because of the smoke due to obstruction of natural air in the nostrils.
They produce oocytes (eggs) for fertilization and they produce the reproductive hormones, estrogen and progesterone. ... In the ovary, all eggs are initially enclosed in a single layer of cells known as a follicle, which supports the egg.
