I. Sleep plays a crucial role in memory consolidation and learning. II. Adults typically need between seven and nine hours of sleep nightly. III. Poor sleep has been linked to weakened immune system function. IV. Coffee exports remain a major source of income for several countries. V. Establishing a consistent bedtime routine can improve overall sleep quality. (I-V) numaralı cümlelerden hangisi parçanın bütünlüğünü bozmaktadır?
