Which is a way that a human responds to change?
A, inhaling oxygen
B. exhaling carbon dioxide
C. eating a hamburger
D. wearing warm clothing in the winter time

its either a or b i don't know exactly cuz I didn't learn this but I tried looking it up and it didn't work

a: the sheep and waste material both release carbon into the atmosphere.

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.