Answer:
NFC technology
Explanation:
NFC stands for near-field communication , which consist of a set of protocols that allows two devices to exchange information.
In the examples above, the flow of information occurred from the phone (which contains the data regarding how much money you put in) and the terminal (which contains data regarding product price). By tapping the phone, the consumers initiate the exchange of information and the balance in the phone will be automatically deducted by the price in the terminal.
Answer:
the answer is b that is the correct answer i looked it up
I think the phrase to be filled into the gaps is "the great wall", and more specifically, "The Great Wall of China".
The earlier structures were were built as early as 7th century BC, and they were joined around 3rd century BCE.
Answer:
Carbon dioxide (CO2): of the greenhouse gases, this is the most important associated with human activities, and the main responsible for this effect. The concentration in the atmosphere is due to the use of fossil fuels for industrial processes and means of transportation. Its emission comes from all kinds of combustion processes: oil, coal, wood or by volcanic eruptions.
Explanation:
A greenhouse gas is an atmospheric gas that absorbs and emits radiation within the infrared range. This process is the fundamental cause of the greenhouse effect The main GHGs in the Earth's atmosphere are water vapor, carbon dioxide, methane, nitrogen oxide and ozone
