Which statement is an example of an observation a scientist would make to classify a rock

-efficient data acquisition

-medical data processing

-data analysis for research

-voice recognition systems

true                                                                                                       true true true true true true

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]