An example of would be if you are at a party talking to a group of friends, your attention is suddenly drawn to another group's conversation as your name is mentioned.] coarse hero

An example of "the cocktail-party phenomenon".

Explanation:

Cocktail-party phenomenon is the term used to refer to our innate ability to separate important information from background noise, such as having a conversation with a single person in the middle of a crowded room, or realizing that your name has been inserted into a conversation. which you are not participating in, as shown in the question above. This phenomenon has been difficult to study because monitoring the exact pathways of neurological response to any particular stimulus is complicated, but science is beginning to make progress.

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations.

question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals