Chemical hand warmers come wrapped in plastic. What happens when the plastic is removed and the chemicals inside come in
contact with the oxygen in the air?
A. The mixture of chemicals takes in coldness from its surroundings.
B. A chemical reaction transforms thermal energy into chemical
energy
C. A chemical reaction transforms chemical energy into thermal
energy.
D. The mixture of chemicals takes in heat from its surroundings.

B. A chemical reaction transforms thermal energy into chemical energy

Explanation:

I hope it helps <3

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.

where is the option.let me know