A country was experiencing high birth rates because of widespread illiteracy. At the same time an epidemic broke out in this cou
ntry, killing many people. After many years, the death rate started declining due to agricultural and public health systems. There was more youth population in the country. The country is in which stage of demographic transition?A. pre-modern B. urbanization C. mature industrial D. Postindustrial
In urbanizing stage, death rate quickly declined because of the improvements in agricultural aspect which goes down to food supplies, health care delivery, medicine improvements, and even the investments in sanitation and infrastructure which contributes to the increasing life expectancy of the people and lesser diseases which cause deaths. Though birth rates remain almost the same, but young population continues to grow because of the low death rate.
Only a little amount of energy as 10% is transferred to the next trophic level. This is called 10% rule. So, in this case as the energy available at the secondary trophic level is 50 kilocalories and 10% of it is transferred into the tertiary level so it would be 5 kilocalories.
