Many different mitochondria
They are autotrophs.
The process by which they get energy is called Photosynthesis - it is used by plants, algae and certain bacteria to harness energy from sunlight and turn it into chemical energy.
B.
because the radioactive decay continues until a stable isotope is formed.
The answer would be C. protista and plants because they are the only ones that contain chloroplasts which start the photosynthesis cycle
