Assuming that people act in rational ways, what psychological model of health behavior specifies several factors that determine whether a person is likely to change behavior when faced with a health threat

Health Belief Model.

Explanation:

Health Belief Model is the model, according to which scientists analyze the behavior of people. People change their health behaviors only when they think they are at risk, or they change to avoid the consequences.

This model was developed to promote health, to prevent disease from spreading, and also to predict health behaviors.

So, the correct answer, according to the definition provided is 'Health belief Model'.

answer; (73%);

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