The second type of body fluid, the extracellular fluid, have two types: the interstitial fluid and the intravascular fluid. The interstitial fluid serves as a messenger for transferring materials to and from cells. While the intravascular fluid is responsible for being within the circulatory systems of the body, being am addition of 4% of the body's weight.
I think it is b... because the ppl are dieing but the ppl being born are staiyin the same :)
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<u>Changes in inheritable physical or behavioural traits</u> due to changes caused by variations as the organism move from one generation to another.
In addition changes in selective pressures of their new environments in order to gain adaptions for survival in the new environment is another factor for this changes.
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The answer is A I believe
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