How does a cardinal increase the size of the sunflower population in its ecosystem. i think it’s d

I agree with you! The more Cardinals drop sunflower seeds into different areas, the wider and larger the sunflower population will get.

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 : )

the correct answer is d