What are some elements that have two-letter symbols that are he first letters of the word

Can someone me with this and tell me what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

Which of the following is one of the four conditions necessary for natural selection to occur in a population? fewer organisms are born than the habitat can support mutation does not occur organisms have identical characteristics variation is inherited

Why would satellite imagery be more useful than a map in some instances? check all that apply. provides landmarks such as buildings is an overhead view of earth’s features can be used when internet is not available provides small details of roads for digital maps provides various methods of transportation to a location