Text-to-text--> Edwin made a text to text connection when he said "I knew about the Nile river because it talks about it in the books "Will Solve it" and "The Mummies Curse" that I have read."
Soil is used for the bottom (foundation) of structures
You have to check the soil before building so it is strong underneath. Massimo gave the example of the leaning tower of Pisa.
