Answer:
B
Explanation:
negative feedback is used to regulate feedback
Answer:
In physics, electromagnetic radiation (EM radiation or EMR) refers to the waves (or their quanta, photons) of the electromagnetic field, propagating (radiating) through space, carrying electromagnetic radiant energy. It includes radio waves, microwaves, infrared, (visible) light, ultraviolet, X-rays, and gamma rays.
Explanation:
If I understood the question.
Electron shell is the outer orbital, while the inner orbital are just called orbitals.
Answer: 1 is a red blood cell and 4 is a white blood cell
Explanation: the red blood cell carries oxygen to mostly the lungs and other parts of the body and the white blood cells fight off disease in your body