Answer is: a secretary smokes a cigarette in a crowded break room.
External cost Is when consuming a good or servise imposes a cost to a third party. In this case, smoking affects other people in break room, causing pollution and health related problems.
An example for X-linked recessive disorder is (C). Color Blindness
<span>the principal of independent assortment is the different genes </span>independently<span> separate from one another when reproductive cells develop.</span>
C. Reforestation is the right answer
