Why was iron used as ballast when ships came to australia?

What type of government does costa rica have?

In which direction does the moving force of air flow? a-from warm temperatures to cold temperatures b-to areas of high pressure to areas of low pressure c-east to west d-from high elevations to low elevations

How does agribusiness people in the developing world? (2 points) i. high-wage jobs ii. better food supply iii. support for traditional agricultural practices i only ii only iii only i and iii ii and iii