Which of the following process is responsible for the formation of the delta at a a place where rivers meet the sea?
(i) Emulsification
(ii) Colloid formation
(iii) Coagulation
(iv) Peptisation
The answer is the option (iii).
While river water is cleaner, sea water is salty. It is because of this that the place where river meets the sea colloidal particles settle down to form delta.