Answer:
the Philippines island
Explanation:
because I know all about the islands by the South China sea
'Climatic variations' and 'Human activities' can be regarded as the two main causes of desertification. removal of the natural vegetation cover（by taking too much fuel wood）, agricultural activities in the vulnerable ecosystems of arid and semi-arid areas, which are thus strained beyond their capacity.
Answer:
Option A will be the appropriate choice.
Explanation:
- The pre-Colombian age encompasses all phase subdivisions throughout American history before the arrival of major European developments on either the American continent, overlapping the duration of the first establishment throughout the Upper Paleolithic era to European colonization mostly during the early medieval century.
- This applies to something like the opportunities ahead of European explorers including colonization arriving.
The other three methods aren't relevant to the particular circumstance. Such that the aforementioned will be the right decision.
Answer:
d). It is easier to make a large reflecting telescope than a large refracting telescope.
f). A reflector can collect more light than a refractor.
Explanation:
A telescope is a device that is used to observe distant objects by the use of lenses and mirrors. It is also used to observe different distant objects by their reflection, absorption, emission or the reflection of the electromagnetic radiations.
Most of the professional telescopes are reflectors because :
1. The reflected telescope is able to receive more of the light when it reflects all the light falling on surface. And it is easier for making a large telescope rather then making large lenses for the refracting telescope. So it is easier to make large reflecting telescope than a large refracting telescope.
2. A reflected telescope receives all the wavelength of the light and it reflects all the light falling on the surfaces where it is refracted telescope that contains lenses cannot absorbs all the light and causes the chromatic aberration.
