Since 1979, the average chinese family a) has decreased in size from 5.9 to 1.5 children. b) consists of mostly female children. c) has more than doubled in size. d) worked for the government.

A) has decreased in size from 5.9 to 1.5 children

Explanation:

The Chinese people had high birthrates, and the population was growing quickly. On top of that, the population was already the largest in the world and it was becoming way to big for the country to be able to sustain itself. In order to stop this process and regulate the population, the Chinese government decided to implement a law where there would be limitation in the number of children a family can have. This law was passed in 1979, and it did its job properly, as the average Chinese family decreased significantly in size, and from 5.9 children and got down to 1.5 children per family.

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; mental health prevention programs;