When describing a community, a biologist would discuss
a. every population that lives together in an area.

b. biome that exists in the biosphere.

c. every organism that can produce offspring together.

d. every ecosystem that is part of a biome.

The right option is; A. every population that lives together in an area.

A community is a group of living organisms inhabiting the same region (such as town, country, or village) or in virtual space (such as the scientific community) and interacting with each other. In a community, organisms share similar characteristics such as language, norms, manners, religion, identity, values and law.

layer 3 is younger than layer 6.

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.