1884-1885 I think sorry if wrong.
Answer:
Devolution, the transfer of power from a central government to subnational (e.g., state, regional, or local) authorities. Devolution usually occurs through conventional statutes rather than through a change in a country’s constitution; thus, unitary systems of government that have devolved powers in this manner are still considered unitary rather than federal systems, because the powers of the subnational authorities can be withdrawn by the central government at any time (compare federalism).
Explanation:
Cobalt is an essential material that is mainly used in lithium ion batteries which are found in smartphones and some electric vehicles. Congo provide majority of the worlds supply of cobalt. Although having a surplus of valuable materials, Congo is one of the poorest nations. Because of the lack of money, those who mine cobalt in the Congo do not used power tools, gloves or mask, but instead they use their hands. With that, the miners would be exposed to high level of cobalt. Lung disease and heart failure have been linked to high levels of cobalt, and the mines that produces it are blamed for destroying landscapes, polluting water sources, contaminated crops and a loss of soil fertility.
Hopes this help. Sorry if there is any grammar mistake.