Which of the following represents a chemical change?

a.bending a wire
b.freezing of water
c.fireworks exploding
d.melting of a wax candle
: d

Fireworks exploding is the answer because the gun powder is reacting and changing to carbon

this is the answer

Explanation:

Neurons communicate with each other by sending chemical and electrical signals. Each neuron is connected with other neurons across tiny junctions called “synapses”. Impulses rush along tiny fibres, like electrical wires, from one neuron to the next. Electrical impulses travel through neurons.