The answer Is feldspar
it is a rock-forming mineral which has particular importance in the glass and ceramics industries since it works as a fluxing agent. This means that feldspar reduces the melting temperature of quartz, consequently helping to control the viscosity of glass. Moreover, this rock-forming mineral is one of the most common minerals in existence, forming approximately 60% of earth’s terrestrial rocks. Finally, each year about 600,000 tons of feldspar is mined in the United States from quarries in South Dakota, Oklahoma, Virginia, California, North Carolina, and Idaho. Besides this, vast deposits of felspar exist throughout the world, but the greatest challenge remains extracting and transporting the minerals to the point of consumption.
There are 1,216<span> incorporated cities in the state of Texas</span>
This would be a perfect example of the system of barter as you are trading one book for the other. You can see from here what barter is, a trading system which involves direct exchange of goods without some kind of medium of exchange, for example money. Services can also be traded this way.
Answer: Social role
Explanation: This dad is an example of engaging in multiple related activities throughout the day, representing a social role. According to social role theory, such activities are linked and are made up of certain behaviors, obligations, rights, beliefs that interfere with a particular social concept and determine social status. In addition to duties, these activities also include freely chosen obligations, but regardless, they must all be fulfilled and faced.
