Question 1:Which statement best describes heating by radiation? a Air at the equator rises and sinks at the poles.

b Warm air rises and takes heat with it; eventually it cools and sinks.

c Air molecules touch the warm ground, heating them up.

d Sunlight travels through space without the aid of fluids or solids

c. heat from the poles back down towards the equator.

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.