Some Scientists believe the missing carbon is going into the boreal forest. They are not sure because the boreal forest both absorbs and releases carbon dioxide. Scientists need more data, gathered from a large region over a period of time in order to come to any firm conclusions about the missing carbon.
Answer:
A) acquisition
Explanation:
Kieran can say that <em>acquisition</em> has occurred as soon as the parrot greets him in response to his entry. According to classical conditioning, repeated pairings between the conditioned stimulus with the unconditioned stimulus leads to acquisition. The conditioned stimulus is a stimulus that produced no response before, that is Kieran's entry.
