Diverse mammals developed and began to flourish in the Cenozoic era . Which of the following also began to develop and flourish during this time ?

it creates acid rain

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d