According to the law of conservation of matter, in any food chain we know that

Answer;

matter is changed into various forms but the total quantity remains unchanged.

Explanation;

According to the law of conservation of matter, in any food chain we know that matter is changed into various forms but the total quantity remains unchanged.

According to the law of conservation of matter, matter is never created or destroyed. In a food pyramid the amount of biomass decreases as we move up through the pyramid, from producers to top level consumers.

-The second law of thermodynamics says that energy always moves from a high usable level of energy to lower less usable forms of energy. The food used by organisms has a high level of usable mass and energy. When the food is burned the mass and energy is at much lower level of usable energy and mass. The mass released as Carbon Dioxide and Water are lost to the food pyramid.

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.