In the context of Kerala's coastal geomorphology, which specific process underpins the continuous shifting and narrowing of beach widths along districts like Kozhikode and Alappuzha during rough monsoon surges?

💡 Solution & Explanation

Longshore drift occurs when waves approach a coastline at an oblique angle, generating littoral currents that move substantial volumes of sediment parallel to the shore. Along the Kerala coast, monsoon wave dynamics continuously reshape beach profiles through this sediment transport mechanism. Other processes such as aeolian deflation or glacial activity are irrelevant to tropical coastal geomorphology.