20 points

which of these forms as part of the life cycles of both low-mass and high-mass stars as a result of a star-forming nebula collapsing and spinning?

a) protostar
b) black hole
c) supernova
d) white dwarf

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

i would say it is

i think its white blood cells

i hope this

d. planting trees

the trees take in carbon to make oxygen.