Anybody who gets the right answer gets brainliest answer and 99 points!
why do so many tornadoes occur in tornado alley

a. this is where cool dry air at lower levels meet up with higher, cool, moist air
b. this is where warm dry air at lower levels meets up with lower cool moist air
c. this is where cool moist air in the lower levels meet up with higher warm dry air
d. this is where low level warm moist air meet with high cool dry air

"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."

sorry, but you do not have posted the diagram.