Which sentence is punctuated correctly?
a. the two authors are in awe of nature their experiences reveal that time in nature can change people.
b. the two authors are in awe of nature, their experiences reveal that time in nature can change people.
c. the two authors are in awe of nature; their experiences reveal that time in nature can change people.
d. the two authors are in awe of nature; their experiences, reveal that time in nature can change people.

C

Explanation:

D: The semi colon between nature and their is correct. It separates 2 main clauses like a coordinating conjunction would or a period and 2 sentences would. The comma after experiences is not needed.

B is actually a comma splice. The sentence is too long to use  just a comma. B is not correct.

Punctuation IS needed after nature.

Answer C

cabeza de vaca was an spanish explorer and n his long exploration of 11,000.km. from florida to present-day mexico, he went through a series of calamities and setbacks that only added to his deeds. he applied his religious creed with the humanist idea, always current and universal, that all men were equal before god and destiny without any discrimination. as an explorer, he became a slave to the tipinoga, then his shaman pointer, later and after an operation of heart to an indian (from which both came alive) he achieved stardom and became a hero followed by a crowd that professed unusual respect and admiration.

adverb is the answer i believe.