Answer:
A. because clasts fall out of the glacier in size progression
Explanation:
Glacial outwash deposits layered because clasts fall out of the glacier in size progression. Glaciofluvial sediments are stratified deposits of sand and gravel, glacialy derived, but deposited by streams flowing from the glacier
B; As far as the relation between humans and the environment, it is obvious how much they relied on it. Not only as a food source, but for economic growth and sustainability as well. The other answers make valid points but in the context of this question, the only one that even mentions the relation is B.
