Noah's ark lifted up
▸ ± Ge 7:17 And the flood was forty days upon the earth; and the waters increased, and bare up the ark, and it was lift up above the earth.
In prophetic riddle, anything lifted up is a shadow of the cross. Prior to the ark being lifted, there was desolation and dry ground (see day 3 of creation). Everything that lived would die unless they were in the ark, even as all flesh not in the cross will die. The ark was an end to judgement and a new beginning just as the cross is.
The "Eat Learn This Book" teaches how all the animals represent men; some of good character and some of bad or 'unclean' character. There are representatives of all men in the ark and cross. Who put them there? God brought the animals to the ark, just as he fills the cross by his own will.
The cross, represented by the ark, symbolizes the culmination of the Father's will.