It is an effect that drug use can have on society?
a. drug use increases pollution.
b. drug use leads to an increase in criminal activity.
c. drug use increases the spread of disease.
d. all of the above

There are numerous effects that drug use can have on a society.  Some of the things are drug use can lead to pollution, increase in criminal activity, and the spread of disease. So the correct answer is D, all of the above. 

The answer would be sand and gravel

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.