Osmotic balance is important to homeostasis because can easily enter/leave the body

The correct answer is: water.

Explanation:

Homeostasis is the state in which the body maintains itself in order to operate at its fullest, and for this to happen there are some factors that the body needs to regulate at all times: body temperature, pH, ion concentration, among others.

Osmotic balance ensures the concentration of electrolytes and non-electrolytes in the different compartments of the body: intracellular, extracellular, inside the plasma.

Since osmotic balance is achieved by regulating the filtration and absorption of water, it is very important for the systems in charge of homeostasis to control this aspect. For example, when there's water loss because of heavy exercise, the anterior pituitary gland releases ADH, a hormone that will act on the kidney to produce the reabsorption of water and avoid dehydration.

the dark variety, as they are not visible on the dark tree barks

explanation:

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."