How do organisms contribute to the carbon cycle?
a. through metabolic processes
b. through the diffusion of hydrogen ions
c. by reflecting light
d. by splitting water molecules

A. Through metabolic processes.

Explanation:

Carbon is a chief component of the biomolecules present in the organisms. Also it is released in the form of product in the metabolic process called respiraton into the atmosphere. The plants take up carbon in the form of carbon dioxide from the atmosphere for conducting a metabolic process called photosynthesis. This maintains the balance of carbon in nature and in carbon cycle.

"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."

ur answer is e & d

explanation: