Formation of the delta at a place where rivers meet the sea can be explained by:
Emulsification.
Colloidal formation
Coagulation
Peptisation
As we have learnt,
A delta is formed at a place where rivers meet the sea due to the process of settling down of colloidal particles. The ions which are present in seawater are responsible for coagulation.
Therefore, the option number (3) is correct.
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