Economic growth can be encouraged by: an increase in cultural elements
a thriving trade
the production of goods
artistic production

Third option

Explanation:

The production of goods is what will majorly help a economy grow. The creation of products to sell and buy from others is what will keep the economy going in whole. It wouldn't be the second option because although a thriving trade is good without the production of goods you cannot keep trading, it wouldn't be a increase of cultural elements because if anything that is a bad thing. With culture getting in the way of buying and selling that would mean certain things cannot be bought if it affects someones culture. Then it wouldn't be the fourth option because artistic product has little to nothing to do with the economy because it's sold at a high price.

Hope this helps.

interdependence is when all participating groups and individuals depend on each other. if you depend on one anothers goods, you end up trading in order to get the items you're looking for. (for ex: if i have food and you have water, we trade in order to depend on each other to live)

the answer is: must pay taxes on profits

since it is considered as a part of your income, profits from investments is eligible for tax payment.

the tax from your investment could be influenced by how long you decided to sell it. united states promotes keeping your investment for long term period. so, the tax rate for investments that you sell in less than one year is typically higher compared to investments that you sell in more than one year period.