The sun is the ultimate source of energy and the process is Photosynthesis.
The answer here is <span>committee judged </span>
<span>Three months after fertilization and development of a placenta around the developing fetus, the corpus luteum regresses and forms the corpus albicans.</span> Formed placenta takes over progesterone production (which was the role of corpus luteum) and the corpus luteum degrades into a corpus albicans. The corpus luteum is being broken down by macrophages, in a process called luteolysis. The remains of the corpus albicans may persist as a scar on the ovary.
It is one of the four layers that surround earth the other three are rock, water, air.