In the video explaining the answers to question number 11-21, the graph of figure 1 is quite different from the one in your video more specifically the indications of the dogs that are 5 weeks old and the dogs that are 9 weeks old.

As of question number 21 "D"  the question goes "slower to show affection for their caregivers..." but when I watched the video the same answer choice comes out as "slower to make eye contact with their caregivers..."

But through your reading and writing lectures, I was able to improve very much in both!