Meconium is meconium is the hormone that is termed "the natural birth control" that inhibits the release of gnrh the hormone that causes a positive feedback mechanism to continue to produce milk a fluid initially secreted by the mammary glands before true milk is produced sloughed epithelial cells, bile, and other substances

Meconium is the earliest or first stool of the mammalian infants.

Prolactin inhibit the release of GnRH hormone.

Explanation:

Meconium is the earliest stool of the infants. Some infants can have their first stool in the womb. Unlike other faeces, meconium comprises of ingested materials accumulated by the baby will in the uterus. It is very thick and dark. It is odourless and contain mucus, amniotic fluid, intestinal epithelial cells and lanugo.

Prolactin is a hormone produced in the pituitary gland that is responsible for milk production. It inhibit gonadotropin releasing hormone which responsible for releasing follicle stimulating hormone and lutenizing hormone. The hormone are responsible for ovulation and prolactin prevent the release of egg.

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.