Question

1. what causes the crystals in gneiss to line up in bands?

a. deposition
b. erosion
c. pressure
d. weathering

Explanation:

Gneiss is a metamorphic rock. The banded pattern (gneissic layering) forms when existing rock is subjected to intense directional pressure during metamorphism. This pressure forces mineral crystals to align parallel to each other, creating bands. Deposition, erosion, and weathering are processes related to sedimentary rocks or surface rock breakdown, not the formation of gneiss's banding.

Answer:

C. pressure