LSAT PrepTest 44 Section 2 Question 4 Explanation | Logical Reasoning

I didn't write the following blog post. It was already on the blog when I took over the URL. The following blog post may contain mistakes. -Steve*** This Logical Reasoning question is from the October 2004 LSAT.First, let's make a chain of short phrases so we can see how this argument's logic progresses:Top layer has bones of eaten birds --> lower layers, before humans, have more kinds of bones -