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যে প্রক্রিয়ার মাধ্যমে ভূমিরূপের উচ্চতার হ্রাস ঘটে তাকে অবরােহণ বলে।
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Answer ( 1 )
যে প্রক্রিয়ার মাধ্যমে ভূমিরূপের উচ্চতার হ্রাস ঘটে তাকে অবরােহণ বলে।