Striations of rocks found at high altitudes are most likely caused by
deposition
abrasion
moraines
compression

moraines

Explanation:

A striangulation means a grove that is created by a moving object such as a place on the surface of the rocks and this is either due to the fault moment and mostly occurs in areas of the glacial action. They can also occur n their habitats like that of the feldspar, quartz and the chalcocite. The velocity and thickness of the ice, relative erosion and the thermal condition of the glaciers also impact their formation. Moraines are formed by the deposition of the material that is on the face of the glacier and are left after the glacier has retreated.

Iwould say d. eye contact and body language because you aren’t using any spoken communication. hope this : )