Question

Lightening occurs due to a ……… between two or more………and ………

Answer 1

electrical discharge; object ; matters

Answer 2

lightning occurs due to accumulation of charge electrons in the air,
as a Strom gross it build up in a cloud and at the same time oppositely charged particles are growing on earth surface

so,
1) accumulation of charge electrons
2) objects
3) substances / clouds


hope it helps u enough