I did that book last sememster, what you need
Answer:
It has decreased because over time because water creates caverns and also polution can kill alge in the water witch can cause the water flow to decrease in folucules.
Explanation:
Hearing because the word crackle is what people use to describe a sound
Answer: they were usually sent to the gas chambers
Explanation:
The young, elderly and sick all were considered useless as far as being laborers. They were separated when they arrived and the group with the elderly, sick and young usually were sent to be killed right away. Anyone that was healthy was kept alive to work