Depressants and stimulants could most simply be described as altering , whereas hallucinogens alter Оа,
a. our biology, our mind
Ob. our mood; our cognitive unconscious
O c. levels of arousal; the contents of our awareness
d. the contents of our awareness; levels of arousal

Males of different species of the fruit fly drosophila that live in the same parts of the hawaiian islands have different elaborate courtship rituals. these rituals involve fighting other males and making stylized movements that attract females. what type of reproductive isolation does this represent?