Question

Which describes the process of fracking? excavating Earth’s surface to reach veins of clean coal pumping toxic chemicals through shafts in the ground to pump out natural gas pumping fluid deep underground to force natural gas out of shale rock detonating explosives underground to release oil and natural gas from solid rock

Answer 1

The correct answer is: "pumping fluid deep underground to force natural gas out of shale rock".

Fracking or hydraulic fracturing is a technique which consists on pumping pressurized liquid in order to fracture the rock. Afterwards, natural gas, oil or brine would flow towards the surface.

The severe environmental impacts of this tecnique have led to the emergence of a social movement of protest against it.

Answer 2

"excavating Earth’s surface to reach veins of clean coal" would be the best option because this is done fairly close to the top of the Earth's surface. It's a controversial and dangerous practice.