4. a manufacturing plant has been found guilty of polluting the nearby river. this is
the pollution.
a. open-field
b. point source
c. nonpoint source
d. water-table

ANSWER:

The correct option is C- Point source pollution.

EXPLANATION:  

Point source pollution is an identifiable source of pollution from which pollutants are discharged. Since the manufacturing unit has been identified as the source of polluting the nearby river, it is the point source of pollution.

Factories and sewerage treatment plants are common point source pollutants. Pollution is basically the "contamination of water or air" by pollutants. The pollutants degrade the quality of water or air making them unfit for use.

a physical change is being made.

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )