1. astronaut 2. biosphere
3. desalination
The process where light shining on
a metal surface causes electrons to be
emitted from the surface.
The splitting of an atomic nucleus
resulting in the release of large amounts
of energy
The process of removing salts and
other chemicals from sea water
A person who travels beyond the
earth's atmosphere.
The volume of air, water, and soil
surrounding the earth within which
conditions support life.
The union of atomic nuclei to form
heavier nuclei, resulting in the release of
enormous quantities of energy.
The packet of electromagnetic
4. fission
5. fusion
6. photon
7. photoelectric effect
energy

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.