A) agonist is the correct answer
A desert would be a good example because there is no exact source of water there unless you are in a specific one.
Homo Erectus beings were literally mixed between Ape and Homo Sapien but I could be wrong... Also they Were the cavemen of the Homo Sapiens to I believe. Hope my Opinion/Answer helped. :)
Soft inheritance sometimes referred to the secondary form of inheritance via epigenetics. Soft inheritance is exactly the opposite of hard inheritance in which the hard inheritance is the <span>states that characteristics of an organism's offspring (passed on through DNA) will never be affect by the actions that the parental organism performs during his lifetime.</span>