Once a star produces enough heat from friction, it switches to this type of energy production:

Star Formation

The infalling gas releases kinetic energy in the form of heat and the temperature and pressure in the center of the protostar goes up.

Explanation:

hope it helps (●´з`)♡

its makes radio waved which causes solar energy for earth

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )