Answer:
Wastewater treatment
Explanation:
The major aim of wastewater treatment is to remove as much of the suspended solids as possible before the remaining water, called effluent, is discharged back to the environment. As solid material decays, it uses up oxygen, which is needed by the plants and animals living in the water.
B a meteorologist is the answer
B. canadian territories are under a constitutional monarchy
Canada
still exists such that the Queen of England is the head of state or
formal representative of canada. However they are protected by a
constitution and act as an independent nation with a head of government
(the prime minister) taking care of actual governmental affairs. The
queen does not have direct power in the same manner as the prime
minister hence the division head of state vs head of government.