The clouds consist of charged particles of water dispersed in air.Some of them are +vely charged, others are -vely charged.When +vely charged clouds come closer they cause lightening and thundering whereas when +ve and -ve charged colloids come closer they cause heavy rain by aggregration of minute particles.It is possible to cause artifical rain by throwing electrified sand or silver iodide from an aeroplane and thus coagulating the mist hangind in air.
Agl helps in artificial rain because :

Options

A. it helps in condensation process
B. It helps in dispersion process
C. It helps in coagulation
D. all of them

Answer

C

Explanation

Agl coagulates mist hanging in air