land use management questions

1. Compare and contrast the following tools for implementing land use management goals and objectives.  (Please include constitutional and statutory references to considerations of policy power and eminent domain principles that underlie each of these land use management tools and give examples of land use management objectives for which each might be suited.
a. Regulations such as zoning, special environmental protection ordinances, etc.
b. Public purchase of land outright (fee simple ownership) to keep it out of development altogether.
c. Public purchase of easements (less than full fee ownership) such as the right to change its use, or the right to develop it with structures, transferable development rights, etc.
d. Transferable development rights

2.Describe the Supreme Court Case that restricted the use of zoning to control coastal development