Which detail from "Max in the Year 2300" most clearly foreshadows what Max is?

He passed the modern bathroom which held wall-to-wall mirrors, not an appliance with water in sight.

Breakfast over, bowl cleared, he crossed back through his serene home, admiring the bird prints that decorated the walls.

"Zara... Which artist took that magnificent photo of the cat who acted in Puss in Boots?" Max asked, curling lower into the couch.

He particularly liked the plump young partridges trailing behind their mother. One could touch and squeeze them.

The detail from "Max in the Year 2300" that most clearly foreshadows what Max is, is "He particularly liked the plump young partridges trailing behind their mother. One could touch and squeeze them."