Answer quickly and correctly for brainliest!
which is a difference between the paleozoic and mesozoic era?

a. animals lived in the water during the mesozoic and on land in the paleozoic.
b. the first birds emerged in the paleozoic era while mammals first emerged in the mesozoic.
c. many different species of dinosaurs lived in the mesozoic, but they all died off in the paleozoic.
d. animal complexity increased during the paleozoic while the first flowering plants appeared in the mesozoic era.

Can someone pretty me with this ? it’s urgent. compare the three theories of emotion. here are the three theories of emotion. cannon-bard theory of emotion: the belief that both psychological arousal and emotional experience are produced stimultaneously ( at the same time) by the same nerve stimulus. james-lange theory of emotion: the belief that emotional experience is a reaction to bodily events occurring as a result of an external situation. ( “ i feel sad because i am crying.) schachter-singer theory of emotion: the belief that emotions are jointly determined by a nonspecific kind of psychological (bodily function) arousal and its interpretation, based on environmental ( natural surroundings) cues. which of these theories makes most sense to you? why. your response should be written using proper english spelling and grammar. and it needs to be 10 complete sentences.