Which of the following are two mechanisms for water pollution?
a.
high and low
b.
direct and indirect
c.
lethal and nonlethal
d.
harmful and innocuous

Direct pollution is when contaminants are put directly into a body of water. This will have an immediate affect on the habitat. Sometimes pollutants end up in bodies of water even though nobody directly put the there. An example would be laundry detergent, which gets flushed out of our houses and ends up in nearby water sources. In this case, indirect pollution has occurred.

Ik that weed can cause brain damage, but are you telling or asking?