Its b. Ecosystem
Population is the number of a species in an area, it has nothing to do with physical characteristics.
Abiotic is just an adjective meaning not alive
Competition is just the interactions between organisms in the struggle for food, water, space, mates, and many other things again not physical characteristics
Answer: "symbiosis" ; or, a "symbiotic relationship" .
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In the case of chronic bronchitis or chronic inflammation of the airways, cyanosis or the bluish discoloration of the skin results from the reduced levels of oxygen in the blood. With reduced oxygen levels, the blood in the arteries will not be bright red in color but rather be brownish just like venous blood and this reflects in the skin as bluish in color.
Answer:D
Explanation:
This isn’t B, because it’s only one species. It isn’t C, because it is one population, and A doesn’t make sense due to how they are of course organisms. D is your best bet.
Answer:
what ? u don't know how to answer that question sorry