Question

Why do fireflies glow at night?​

Answer 1

Answer:

they have some protein in their body......

Answer 2

$\huge\underline\bold\color{red}\mathfrak{Answer}$

Fireflies produce a chemical reaction inside their bodies that allows them to light up. ... When oxygen combines with calcium, adenosine triphosphate (ATP) and the chemical luciferin in the presence of luciferase, a bioluminescent enzyme, light is produced.