How do you suppose living conditions differ between the country furthest along in the demographic transition compared to the country earliest in the transition? how would living conditions in these two countries affect both birth and death rates?

The difference in living conditions between these countries is :

The country in the earliest transition will have an impoverished living condition due to poverty. while

The country in the Furthest transition will have a more improved living conditions because of proper infrastructural development and most Inhabitants are high income earners.

The Birth rate and death rate will be higher in the country earliest in transition due to poverty and poor living conditions which in turn shortens life expectancy.

The Birth rate and death rate in the country furthest along the demographic transition will be lower due to the healthy living conditions and life expectancy will be high as well

Hence we can conclude that the response to your question is a stated above .

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Two countries that are on the opposite sides of the demographic transition, one being in the first faze, while the other in the fourth faze, will differ in pretty much everything.

The country in the first faze will have low economic development, bad infrastructure, the availability to the institutions will be limited to only some people. Most of the population will live in poverty, being on the verge of survival, and in very unhygienic conditions.

The country in the fourth faze will be the total opposite. It will be a highly developed country, with excellent infrastructure, the institutions are available for everyone. Most of the population will high income and be living in nice conditions.

In the country in the first faze, the birth rates will be high, but the death rates will be high as well, having a very low life expectancy too. In the country in the fourth faze, the birth rates will be very low, and the death rates will also be low, with the life expectancy being very high.