If you have a job that involves manual labor, you are doing blue-collar work. <span>A </span>blue collar<span> is a working-class person historically defined by hourly rates of pay and manual labor. A </span>blue collar<span> worker refers to the fact that most manual laborers at the turn of the century wore </span>blue<span> shirts, which could hold a little dirt around the </span>collar<span> without standing out.</span>
Your answer is Electrical energy
Answer:
A. enable us to form tentative hypotheses about what students know and can do.
In short and in general, formal language is the language you would use when talking to your boss or employes and informal language is the one you use when talking to a friends
