The student observed that the temperature changed from 25°C to 23°C when the solutions were combined and that a white substance rapidly formed and settled to the bottom of the container. What most likely happened to
produce these results?
A
One of the original compounds came out of solution.
B
The solutions reacted chemically.
с
Some of the water froze into ice crystals.
D
Rapid evaporation of water occurred, leaving a solid.

answer; i believe the correct answer to the above question is ( friction)

a community that experiences major changes undergoes progress

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)]