According to one theory, earth's moon accreted to form its current structure following a giant impact between earth and another celestial body complete the paragraph to describe the process of accretion following the impact, a section of earth broke off. as a result, large pieces of debris started to revolve around earth. the debris was held close to earth by earth's the debris frequently collided to form a planetesimal. as the planetesimal grew in size, its gravity increased. this gravitational force pulled in even more which led to the accretion of the moon.

gravity and matter is the answer :)

Explanation:

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.