People have learnt to make shelters in a way so that they don't get affected by natural disasters that are common in their area. For example, people make houses of complete brick so they are stronger and can withstand a powerful storm
D. powder residues.
the police and forensic chemists usually perform a qualitative test called GPR or gun powder residue. the residue sticks to the skin.
Are there any choices to your question? If so what are they? Then I can answer. :)
I believe it’s
The reactants
The products
And the Arrow indicating the direction of the chemical reaction
