Which light-sensitive vitamin is abundant in milk? riboflavin alpha-tocopherol vitamin c thiamin?

I would say the thiamin  is more light sensitive.

your spelling is a little off : ]

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101