A fragment is a sentence that does not represent an independent clause and cannot stand on its own. An independent clause requires a subject and a verb, while a fragment does not have one of this requirements. In this case, the fragment that could become an independent clause through the addition of a complete subject is the first one. The sentence would look something like this:
Ex. [<em>The old photographs</em>] revealed much about their behavior.
B. They suggest a sense of space with resonating power. "Wild and free" sounds powerful and since it is desert and the forest, it also implies space. Hope this helps.