The correct answer is: A) Sanitation
Sanitation refers to the conditions that relate to public health, including the provision of clean drinking water as well as sewage disposal. The lack of basic sanitation leads to numerous problems. One of the most important is the death of thousands of children, over 525,000 of them dye every year because of diarrheal disease according to the World Health Organization.
What were Sam Houston's views on the civil war 1861-1865? Sam Houston was against immediate secession by Texas
The Louisiana purchase
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He built the most powerful navy in the world.
That is something he did NOT do.