Answer:
The correct answer is - volatile organic compounds.
Step-by-step explanation:
Fracking liquid waste is a type of waste that is producing during the oil drilling process by hydraulic fracturing. It produces some toxic and carcinogen substances that are needed to treat properly or these will mix with drinking water.
Other than these toxic substances the fracking liquid waste also produce volatile organic compound due to oil drilling which is very harmful to the environment as these organic compounds can evaporate and move to air and atmosphere to contribute to pollution.