When was the last epoch in which organisms could start walking across the bering strait and panama canal? pliocene pleistocene holocene eocene

The answer is; Holocene.

The Bering Strait is located in the Arctic circle and is a small continental gap between Russia and Alaska. About 11, 000 years ago, the ice age locked up most of the water the polar circles hence the ocean levels were lo exposing the Bering Strait crossing. This allowed organisms to cross between the two continents.

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.