Respuesta :
I am 90% sure it's A. I know that the different ingredients causes them to be different colors. The shapes and timings are usually man made.
A- Different colours of explosions. Different materials will burn different colours.
Element & flame color
Calcium= orange-red
Strontium= red
Barium pale= green
Copper= blue-green (often with white flashes)
Element & flame color
Calcium= orange-red
Strontium= red
Barium pale= green
Copper= blue-green (often with white flashes)