Light. When an electron falls to a lower orbit it gives off energy as a photon. Spectral lines give evidence of electrons moving from one energy level to another within the atom.
Electromagnetic waves flow most quickly through gases, as they are faster in masses with fewer particles.
Atmosphere and Hydrosphere are the answer. The atmosphere is a layer of gases that surrounds in the planet or other material inside the body that is held in place by the gravity of that body. There is also Atmosphere in earth or what we called Air, it is also a layer of gases. It is the whole mass of air that surrounds the earth so that we can breathe freely. Earth atmosphere contains 78% nitrogen, 0.9% argon, 21% oxygen and 0.03% carbon dioxide. Hydrosphere in the other side is all the water on the earth’s surface example are lakes, seas and sometimes including water over the Earth’s surface like clouds.
The answer is D) <span>Electrons are transferred to ferredoxin.
Photosystem I is the part of </span><span>photosynthetic light reactions. It is membrane protein complex which uses light energy to transfer electron from plastocyanin to ferredoxin.</span>
