Quimby, a 15-month-old child, looks to her mother to see if she should be afraid of the stranger who has come to her home. Quimby relaxes when she sees her mother smiling and speaking to the stranger in a calm voice. Quimby is engaging in .

Social referencing

Explanation:

Social referencing is a process by which infants use an adult's emotional demonstration to regulate their behaviors or disposition towards people, situations or objects in their environment. In other words, infants make use of information from adults facial expressions to help them understand and make decisions about their environment.

Quimby relaxed when she saw her mothers friendly disposition towards the stranger, she was able to process that the stranger was not to be afraid of.

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

answer; humanistic;