GMAT Critical Reasoning (CR) | Re: In Peru, ancient disturbances in the dark surface material

First question: C
Second question: B

In the second question answer B states that streight lines represent part of the more complex structure of lines in which the "bird lines" are also the part of the more complex structure. Therefore, this statement "counters an objection that the crossing of the straight-line pattern over the bird figure shows that the two kinds of line pattern served unrelated purposes".