Briefly explain four causes for students to drop out from university

Stress, Low Budget, Social Issues, and Moving to another country.

Explanation:

some teachers tend to give a lot of students large amounts of assignments, and they're expected to complete them by the next day or week. It can be overwhelming.

People with low budgets while in university may not be able to afford the prices of classes so they drop out and don't get a degree.

Sometimes people deal with bullying and exploting, so they feel like they should drop out to escape Social traps.

If your Moving to another country or state while in college, you might have to come back to get your degree. If you can't then people would drop out and attend another university somewhere else.

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