Free-enterprise economy
A, B, and C will hurt an underdeveloped nation. D would help the nation strive into becoming an first would country. The question is asking what will not hurt an underdeveloped nation.
Answer:
There, ecosystem services are grouped into four broad categories: provisioning, such as the production of food and water; regulating, such as the control of climate and disease; supporting, such as nutrient cycles and oxygen production; and cultural, such as spiritual and recreational benefits.
Explanation:
Answer: about half the mass and a million times higher density.
The closest answer is B
Explanation:
A white dwarf is what remains of a star after it uses up its nuclear fuel. Before a white dwarf is formed, it discards the external layer and retains its hot center. This center can be as hot as a hundred thousand Kelvin which then takes tens of millions of years to cool down. White dwarfs are very dense, an Earth-sized white dwarf has a density of a billion kg/
. In comparison to the sun, it is about half the mass and a million times denser.