Not sure if this is correct but I'm gonna say natural resource
Tax brackets in Australia.
Tax brackets in Canada.
Tax brackets in India.
Tax brackets in Malta.
Tax brackets in the Netherlands.
Tax brackets in New Zealand.
Tax brackets in Singapore.
Cross sectional studies is the correct answer.
Cross-sectional research is used to examine participants' behaviors of different ages at one point in time. These studies are useful for a variety of reasons: data collection can be proceeded rapidly, the cost is a lot lower than a logitudinal research since there is no need to keep contact and follow-up with participants as time passes, and because of that practice effects are not a problem. On the other hand, the principal limitation of this research is that the results produce information regarding age-related change, instead of development per se.
I will help If you answer this one thing. Are yuou a K12 student?
The second step in the prewriting process is to make sure that where you are getting any information, is from a credible and reliable source.