How did the coronavirus affect the primary sector, the secondary sector and tertiary sector?

It disrupted exams and learning processes.

Explanation:

Many people had to use online classes or even stop school completely.

For online classes, it was more inefficient. Etc, schools giving many breaks as student's eyes were staring at the screen for long periods of time, during zoom meetings, students go to other websites. Students had also said that physical classes were better due to it being more efficient, and could learn better

c

explanation: because you need to reduce the pollution on land,the exhaust fumes will stop,and stop it in water,the oil that is in the oceanharms the fish   sorry if you   have been waiting long  

answer; the president uses mass media to gain support for policies;