How does the use of fossil fuels by humans affect the carbon cycle? The burning of fossil fuels prevents carbon from being released back into the air.

When humans burn fossil fuels, it consumes carbon dioxide.

Oxygen is replaced with carbon when fossil fuels are burned.

Burning fossil fuels releases carbon dioxide into the air.

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explanation:

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"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."