A researcher is interested in assessing risk-taking by individuals. The researcher is sitting on a bench near a busy four-way stop intersection. She plans on recording the number of bike riders wearing a safety helmet and whether they stop at the intersection before proceeding in order to correlate use of safety apparel with risk-taking. This collection of information is an example of: Private information Public information Private behavior Public behavior

This collection of information is an example of public behavior.

Explanation:

-Private information refers  to information that is linked to people and provides details about their lives.

-Public information refers to information that is not confidential and is available to everyone.

-Private behavior refers to a behavior that is not accessible to any individual apart from the person that does that.

-Public behavior refers to a behavior that can be observed by anyone.

According to the definitions and the information provided, the answer is that this collection of information is an example of public behavior because the researcher is in a public place and she is observing people's behaviors that can be seen by anyone.

the answer to this question is d

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