Answer:
Climate change, carbon dioxide, catastrophe, current, critical, crises.
Ecosystems, earth, envirerment.
Explanation:
The authors purpose suggested by the text is explain how to use the guitar because it's not trying to convince you to buy a guitar and it isn't teaching you about all the parts on the guitar just how to tune the strings. Hope you found this helpful!
The speaker means that B. <span>Even when they were tired and had doubts, they remained faithful.
The "voices singing in [their] ears" were themselves, thinking of the doubts they have. </span>