In both a dry cell and a wet cell battery, what causes the production of an electrical current. a. chemical reaction

b. a step down substation transformer

c. magnets

d. generators at a power plant

a. chemical reaction

Explanation:

In both a dry and wet cell battery, electric currents are produced through chemical reactions.

Both cells are together called electrochemical cells.

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d

there are no contact forces mentioned on the list of choices that you've provided.