Answer:
a. access to clean raw water sources
Step-by-step explanation:
The most significant determinant is the easy access to clean water source.The easy access to the source is the main factor that affect clean water availability.
The best rock that confines clean water are basement complex. This rocks are free from impurities. The ground water may be confined or unconfined.
The availability of money can also improve access but the money will only be used to increase labor and expertise.
The local drought conditions might not affect ground water availability.
The level of industrial development is not the most significant to determine access to potable water.