Model tenements, built to create better lives for the poor, were: apex

Nicer apartment buildings in the slums.

Explanation:

; )

Model tenements did not improve the lives of the poor, as they turned out to be poorly ventilated and have unsafe sanitary conditions.

Explanation:

Model tenements were built in the mid 19th century to provide housing for poor people. They were supposed to improve the living conditions of the poor. However, they turned out to be tiny apartments with little ventilation and unsanitary conditions. Modern tenements have improved living conditions, but they still lack modern equipment since some apartments have 100 year old kitchens and toilets.