What metallic element is sometimes used in flares and flashbulbs

Magnesium is used in flares and flashbulbs.

Explanation:

Magnesium is the metal having atomic number 12 and mass number 24

Magnesium burns with a brilliant white light and is used in pyrotechnics, flares and photographic flashbulbs.

Magnesium is the lightest metal that can be used to build things, although its use as a structural material is limited since it burns at relatively low temperatures.

Magnesium can be extracted from the minerals dolomite (CaCO3·MgCO3) and carnallite (KCl·MgCl2·6H2O), but is most often obtained from seawater.

the food using pesticides in the future will harm you by giving you diseases like cancer or something since they have things that we should not eat in it like chemicals or pesticides. that is why organic food is more expensive because they take the time to make it right and healthy for you to eat.

explanation:

i'm pretty sure its b i might be wrong though!