Which Factor listed below is biotic. Bacteria, soil, sunlight, Rocks

Bacteria is a biotic factor here, cuz biotic factors include living organisms, but soil, sunlight and Rocks aren't living , and bacteria performs every life process hence, it is considered as biotic.

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.

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i got you i did it ya know what it is just needing to fill this in for a quick task!