The answers are: Sustainable development is largely a regional issue.
and;
Sustainable development policies only need to consider environmental protection.
Answer:
As the cloud shrinks in size, its central temperature increases, as a result of its gravitational potential energy being converted to thermal energy.
We are assuming that the mentioned cloud, is a cloud of interstellar dust (nebula), in which this definition is applicable. Since energy cannot disappear, the lost gravitational potential energy would have to transform into something else, in this case, thermal energy, or simply heat, which will increase the overall temperature of the cloud.
A soil associated with the hot and wet tropics is laterite. It is a soil and rock type rich in iron and aluminium, and is commonly considered to have formed in hot and wet tropical areas. Hope this answers the question. Have a nice day.