Which statement explains the observation that sediments on earth's surface sometimes differ in composition from the underlying bedrock? a. weathering and erosion break down bedrock into soil. b. sediments are formed from the local bedrock. c. bedrock is formed from local sediments. d. sediments are carried from place to place.

 D. Sediments are carried from place to place.

Weathering is the process of breakdown of rock or soil particles into sediments by the effect of wind, water or chemical agent. Erosion is the process of removal or displacement of finely grained surface or sub-surface soil by the effect of wind, water or any other agent. In both weathering and  erosion, the sediments are displaced to the location other than the one where their parent rock originated. Therefore, sediments are carried from place to place. Hence, the composition of sediments will be different from the composition of the underlying bedrock.