The correct answer is option A
A person that is having an allergy with pollen grains should take antihistamines.
When there is an allergic reaction in the body then the body releases histamines which evokes immune response.
As a result of this the person starts sneezing, runny nose, hives et cetera.
So, one should take antihistamines to prevent the action of histamines on the body.
<span>A behavior that comes at a cost to the individual performing it and benefits another.
Behavior any and all of the actions performed by an organism, often in repines to its environment or to the action of another organism. An action or signal on the part of one organism that alters the behavior of another organism.An innate sequence of behaviors, triggered under certain conditions, that requires no learning, does not vary, and once begun runs to completion; an example is egg-retrieval in geese. The process, extremely uncommon in nature, which brings about an increase in the frequency of alleles for traits (e.g., behaviors) that are beneficial to the persistence of the species or population while simultaneously being detrimental to the fitness of the individual possessing the trait (or engaging in the behavior).</span>
Answer:
Chimneys are ventilation channels that guide smoke and other gases that are products of combustion out from a fireplace through the roof of a building. ... The warm air can then leave the house through the chimney through the same process of rising that hot smoke does when wood is being burned.
Explanation:
The answer is actually true, because its a tiny spot in the center of the retina that contains only cones.