Having a complete set of electrons in a valence shell will increase or decrease the rate of a chemical reaction

decrease

Explanation:

atoms seek to have full valence electrons, and react with others in order to gain or lose electrons. When an atom has all valence electrons it is not reactive. This is why noble gases aren't reactive.

b

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."