What caused the great recession of 2008-2009?

housing market colapse

people buying stocks on the margin

increased oil prices

stock market crash

What caused the Great Recession of 2008-2009 was the housing market colapse.

Explanation:

Great Recession is called to the world economic crisis that began in 2008, which originated in the United States.

With the fall of US investment banks due to the subprime mortgage crisis, which accounted for a high percentage of their investment, stock markets and stock markets collapsed and caused the 2008 financial crisis worldwide.

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