The answer would be “D,” as gravity is the force that keep all objects on Earth’s surface.
Answer::: Brain structures called the hypothalamus and pituitary gland control the menstrual cycle. The hypothalamus triggers the pituitary gland to make hormones that trigger the ovaries to make oestrogen and progesterone. ... Disorders of the hypothalamus, pituitary gland or ovaries can affect menstruation, causing amenorrhoea
One organic waste that is not found in urine is called Bicarbonate Ions
