Mali rose to the height of its power under Mansa . a
Sundiata
b
Sunni Ali
c
Soumaoro
d
Musa
free points

D: Musa

Explanation:

Mali reached its height under the ruler Mansa Musa. 1400s. The wealthy and powerful Mali Empire ruled West Africa after the fall of Ghana.

D musa

Explanation:

Under Mansa Mūsā (1307–32?), Mali rose to the apogee of its power. He controlled the lands of the middle Niger, absorbed into his empire the trading cities of Timbuktu and Gao, and imposed his rule on such south Saharan cities as Walata and on the Taghaza region of salt deposits to the north.

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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