Remember that a biotic factor is a living component in an ecosystem that affects the population of another organism. So that means that the answer is B.
<span>nerve cells need b 12 for proper functioning</span>
Answer:
C. habituation trials continue after the response has disappeared.
Explanation:
habituation involves the complete elimination of a particular response (i.e, zero frequency of occurrence). If the stimulus cintinues to be presented for an additional number of trials, then, although no further changes occur, the response will exhibit lower levels of recovery (e.g, spontaneous recovery is reduced) as if the response would have fallen below a zero frequency.