How does the immune system work together with the circulatory system to function properly? a. the white blood cells of the immune system fight and destroy pathogens. b. red blood cells move through the body (to parts where they are needed) in the blood vessels of the circulatory system to fight infection. c. the infection site receives oxygen-depleted blood from the circulatory system's arteries, so the immune system works harder. d. pathogens released by immune cells cause increased blood flow to the infection site, which brings other pathogens to the area more.

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.