Infer why there might be so many more of one kind of flatworm than any other kind :)

There might be more of one kind of flatworm than any other because they adapt more to their enviorment than any worm. OR its because they have more access to resources

on: (any answer is correct because you are making a inference)

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.