An Example of a Q&A Site Is

question 1

Multiple Choice

An example of a Q&A site is:

• A) Stumbleupon.
• B) Reddit.
• C) Quora.
• D) Compuserve.
• E) Google.

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Definitions:

Gangue

The valueless minerals or rock that are mined along with valuable minerals or ore, typically disposed of as waste.

Profitably Extractable

Refers to natural resources that can be mined or harvested at a profit, considering the current market prices and extraction costs.

Compacted Plant Remains

Organic matter that has been compressed over time into solid formations, often contributing to the formation of coal and other fossil fuels.