1. Explica el significado de responsabilidad social

Translation:  "Explain the meaning of social responsibility"

English - Social responsibility means that individuals and companies have a duty to act in the best interests of their environment and society as a whole. ... The crux of this theory is to enact policies that promote an ethical balance between the dual mandates of striving for profitability and benefiting society as a whole

Spanish - La responsabilidad social significa que las personas y las empresas tienen el deber de actuar en el mejor interés de su medio ambiente y de la sociedad en su conjunto. ... El quid de esta teoría es promulgar políticas que promuevan un equilibrio ético entre los mandatos duales de luchar por la rentabilidad y beneficiar a la sociedad en su conjunto

a: social security and social programs

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