Tropical, because their aren't any large dangerous animals, only snakes that could be avoided. They can fish or eat local produce, that the climate provides, so they probably wont starve. They wont freeze from hypothermia as long as they make fire by night, and they wont over heat like they would in the dessert, because they have trees to shade them and it is cooler by the water. Unlike in the dessert, or tundra the chance of finding clean water is greater, so they probably wont dehydrate. Also most tropical islands have coconuts they can also drink.
The Council had been called to examine doctrine and reform. Charles V had wanted abuses looked at first in an attempt to please the Protestants and hopefully tempt them back to the church. Once they were back they could look at doctrine. Paul III did not want this as reforms could financially damage him and concessions could diminish his authority. The result was that two separate sections dealt with reform and doctrine simultaneously.
<span> if this helps!!</span>