Precambrian rocks<span> are mostly covered by rock systems of more recent origin, but where visible they commonly display evidence of having been altered by intense </span>metamorphism<span>. Precambrian rocks often occur in shields, which are large areas of relatively low elevation that form parts of continental masses.</span>
Answer: Excessive tariffs harm international trade. For countries that are dependent on exports to fund their economy, trade barriers can be detrimental to their economies. This creates a supply surplus. Businesses are then forced to sell products at a cheap price.
Iit means that the economy managed to 100 % used all of it's resources, which mean that :
- there will be no unemployment
- There would be no economic efficiency,
- and there is always a constant steady flow of capital
hope this helps
