In medicine, the movement of limbs or bones is classified into different types including abduction, adduction, extension, and circumduction. In this way, adduction occurs when the bone or limb moves towards the middle line of the body or center of it while abduction occurs if the movement makes the bone or limb be away from the center of the body. On the other hand, extension occurs when a movement makes the angle of body parts wider and circumduction occurs when the movement is circular. Considering this, the type of movement in which a bone moves away from the midline of the body is the abduction.
The answer, though i'm not quite sure' should be sulphate aerosols, though i think that is actually what the clouds are made out of. So the answer might be instead just stratospheric ash clouds
