"anaerobic" activity is activity without oxygen.

Antagonist activity is the activity that is counter to the agonist or it can be viewed as an inhibitory activity. If pharmacology, the antagonist does not have any activity, but it blocks or inhibits the activity of the agonist.

i believe that the levels of economic activity is

1.primary activity

2.secondary activity

3.tertiary activity

4.quaternary activity

Yes. It is the electrical activity that stimulates the mechanical activity.

Economic activity is the activity in which we work for earning an incom.

Non economic activity is the activity wich we do it for our satisfaction.