Fossil fuels such as natural gas and petroleum contain carbon. How did the carbon get into the fossil fuels? It was in the air that was trapped underground when the fossil fuels formed.

It migrated into them from the rocks in which the fossil fuels are found.

It was once part of the organisms from which the fossil fuels formed.

It seeped out of coal buried near the fossil fuel deposits underground.

see earlier

the answer would most likely be c, because if it's a comical piece of information, it may likely not be true, if it's a site that allows anybody to edit the content, it could mean a five year old is typing the info, and if it's a tv show produced by a celeb, it may have a biased opinion.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.