What is one reason why rock layers are not horizontal? They were formed at an angle.

They were formed veritcally.

The area was once covered by water.

A force pushed the rock layers after they were formed.

the last one, as they would be pushed together either going up or down when tectonic plates shift.

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."

there's the proffessional site that will you.