What role do decomposers play in the cycling of material in a biogeochemical cycle? Decomposers make chemicals from the nonliving environment into organic compounds.
Decomposers incorporate some organic compounds into their bodies and release some back to the environment as
waste
Decomposers use nonliving processes such as rain and fire to make inorganic chemicals.
Decomposers break down organisms to supply the soil, water, and air with inorganic chemicals.

advantage of using stem cells in medical research:

1.       it provides medical benefits in the fields of therapeutic cloning and regenerative medicine.

2. it provides great potential for discovering treatments and cures to a variety of diseases including parkinson disease, spinal cord injuries, diabetes, alzheimer’s disease and many more.

3. limbs and organ could be grown in lab from stem cells and then used in transplant or treat illness.

the answer is

c. parental

c should be the answer