It means the point on the earth's surface directly above or below an exploding nuclear bomb.
You cannot create maps without Map projection .
The first step is intense counseling, then taking on a role of the opposite gender for at least a year, then the actual surgery for those who are mentally prepared..
They are
1) Coastal Plain
2) Piedmont
3)Blue Ridge
4)Ridge and Valley
5)Plateu
Answer: Longitudinal study.
A longitudinal study is one that involves repeated observations of the same variables over a period of time (in the example, it was four years). The opposite type of study is a cross-sectional study (one that looks at the variables at a given moment).
