An energy resource that can be replaced by nature in a relatively short time is known as a "<span>inexhaustible energy resource" but these are very rare in nature. </span>
Examples:
Respiratory System, (I think) Organ System, Circulatory System, Nervous System, etc.
The answer would be B. The author was worried he/she might not enjoy camp.
He/She wasn't impatient because it said she "dreaded" it so that rules out A.
He/She wasn't welcoming the opportunity, because again, the word "dreaded" was used.
He/She wasn't excited because "dreaded" does not imply excitement.
