the answer should be true
The Moon and the Sun gravitational forces affect our tides.
They filled the pipe with cement but air pockets formed and built up pressure that then exaploded the pipe
The argument is that the mortality transition occurs exogenously and is the cause of a subsequent decline in fertility and rise in urbanization. This exogenous demographic process plays out over time, and has effects on economic, social, and political development. Hope this helps. :)
