Which example defines an economic activity?

Goods & services is an example of "economic activity".

Explanation:

Economic activity is basically an action pertaining to production, distribution and consumption of goods.

Any activity which involves money for which we get products are called "economic activity".

Exchange of Product / services which involves money can be considered as economic activities.

Out of box information:

In the ancient days, people get product for another product and this was going on when the currency was not invented.

The word economy was coined by "Aristotle".