The answer to the question about what happened when Frog and Toad were taking a walk is letter B or the wind blew out Toad’s list. Frog and Toad Together is an American children story written by Arnold Lobel in 1972. This scenario happened on this particular book – the second book in the Frog and Toad series.
Toad’s list included some of the following consecutively: wake up, eat breakfast, get fully dressed and visit Frog’s house. After he was done with the fourth item on the list, he asked Frog to walk with him so he could cross out his fifth item – take a walk with Frog – but the wind suddenly blew his list away. They tried to catch Toad’s list, to no avail.