<p>Here is the explanation provided from the College Board website. </p>
<p>ANSWERS AND EXPLANATIONS </p>
<p>Explanation for Correct Answer E : </p>
<p>Choice (E) is correct. In the second paragraph, different sorts of play—stalking and wrestling, playing tag, playing by oneself with rocks and sticks, and tickling others—are associated with different kinds of animals. Thus the varied nature of animal play is displayed.</p>
<p>Explanation for Incorrect Answer A : </p>
<p>Choice (A) is incorrect. In the third paragraph there is mention of an assumption held by biologists that play among animals “was too nebulous a concept either to define or to study” (line 19). But the kinds of play included in the second paragraph do not support this assumption, nor are they offered in its support.</p>
<p>Explanation for Incorrect Answer B : </p>
<p>Choice (B) is incorrect. The point that the second paragraph primarily addresses—that there are many animals that play when young and that they play in a variety of ways—is not presented in the passage as a controversial point that needs to be proven. It is presented as a point that had long been ignored but which has, in the last two decades, attracted some of the attention that, according to the passage, it deserves.</p>
<p>Explanation for Incorrect Answer C : </p>
<p>Choice (C) is incorrect. The descriptions of animal play in the second paragraph are not offered as contrasting in any way with “a previous description of animal play.” The first paragraph of the passage contains a description of animal play, but the sorts of play described are much the same as in the second paragraph. For example, chasing and wrestling occur in both paragraphs. The passage gives no indication of any historically earlier descriptions of animal play with which the descriptions in the second paragraph are contrasted. Rather, the passage says that “play among animals was ignored by scientists for most of this [the 20th] century” (lines 15-16).</p>
<p>Explanation for Incorrect Answer D : </p>
<p>Choice (D) is incorrect. The second paragraph does include the sentence, “From human children to whales to sewer rats, many groups of mammals and even some birds play for a significant fraction of their youth” (lines 7-9). What this emphasizes, however, is behavioral and developmental similarities between animals and humans, not physical similarities.</p>
<p>I’m not Noitararerp, but the above is totally correct. ^</p>