If I may ask
What is the backbone of bitcoin industry?
Bitcoin is a currency, not an industry.
How can bitcoin be created?
The bitcoin protocol allows the miners (or mining pools) that create blockchain blocks and provide the necessary proof-of-work to assign some value to a special transaction in the block that they create and complete.
Bitcoin mining is the process of earning bitcoin in exchange for running the verification process to validate bitcoin transactions. These transactions provide security for the Bitcoin network which in turn compensates miners by giving them bitcoins. In exchange for this service, the rules of the Bitcoin protocol allow the miner (or mining pool) to award themselves, in a special transaction in the block, a number of bitcoins no larger than the sum of all the transaction fees for all the transactions in the block they've created PLUS the current block subsidy of "new bitcoins". Miners can profit if the price of bitcoins exceeds the cost to mine.
FTFY
