Which conclusion is supported by this evidence?

neither ball has a charge.
the balls are both positively charged.
one ball is positively charged, and the other is negatively charged.
each ball has a charge, but the type of charge is unknown.

the answer is 1 i believe

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

i think it's letter a.