What is the likely cause of the blockage in the following scenario? A plumber, cleaning out recently blocked lines, indicates that there are roots blocking the sewer system. There are no trees immediately over
the sewer line and have not been for years, there is only a small group of trees on the side of the property, several yards from the line
im

a) carbon, hydrogen

b) carbon, hydrogen, oxygen, nitrogen

c) carbon, hydrogen, oxygen, nitrogen, phosphorus

d) sugar

e) amino acid

f) nucleotide

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