Answer:
a. the reindeer population exceeded it carrying capacity
Explanation:
not enough food for the reindeers due to an increase in deer population.
From what i know, in sickle cell anemia the blood is lack of oxygen.
The haemoglobin run from the blood cell because reacted with nitric oxide, and so thats why the shape of the blood change into sickle-shaped like.
Answer is b explanation is because it’s the only one I think makes sense
It is not C. I got it wrong. It is A water!