reason

Here was another puzzling question; and as Alice could not think of any good reason, and as the Caterpillar seemed to be in a _very_ unpleasant state of mind, she turned away.

Pray, what is the reason of that?”

“Is that the reason so many tea-things are put out here?” she asked.

“I dare say you’re wondering why I don’t put my arm round your waist,” the Duchess said after a pause: “the reason is, that I’m doubtful about the temper of your flamingo.