The appropriate answer is d. Dead plants in a swampy environment is the perfect environment for the beginning of the coal forming process. Over time layers pile up in this anaerobic environment. The plant or organic material gets buried overtime by dirt or rocks. Millions of years of burial will expose the matter to heat and pressure and will eventually lead to the formation of coal and other petroleum products.
It takes place in the ribosomes
Neutron are stored within nucleus
Because there is a lack of oxygen that deep. The vast majority of deep-sea life has no air pockets.