The answer is C.
A is not, because the cowboy's appearance is not relevant to his personality as a round character. Same general idea for B and D.
Answer:
to tell when and where the story takes place to explain how difficult it is to travel in some climates to show how dangerous it is to leave Honduras to introduce the main character and describe his traits.
Compound sentence (even though technically he also made the sentence longer)
Mr Thompson is revealed by his Actions as a kind hearted man. Although he had a rough exterior, Joe Thompson, the wheelwright, had a heart, and it was very tender in some places. He liked children, and was pleased to have them come to his shop, where sleds and wagons were made or mended for the village lads free of cost without taking anything from their hoarded six pences.
The technique of alliteration is being used. Alliteration is the occurrence of the same letter or sound at the beginning of closely connected words.
