Answer:
B. That brought him to that creaking room was age" from Frost's "An Old Man's Winter Night"
Answer:
d rivers flowing over a long period of time cut out the bottom of the canyon and wind eroded the sides of the canyon
I think this paragraph is mainly explaining the use of the nerves and exons, and what to do.
Answer:
I don’t doubt the effectiveness of this new gadget, but we simply don’t have the money to buy it.
Explanation:
The word ”effectiveness” means a degree to which something is successful in making a result that is desired. In other words, something with effectiveness is something that successfully produces a result that a person wants/desires. It makes a desired change/effect for the person using it. The effect is rooted within the word too, so that is why it’s the appropriate word to use.