How to create a dichotomous kwy

Figure out what similarities the things have, and it should get more specific the lower you go.

There should be 2 statements in each category.

For example:

1a. has feathers (go to step 2)

b. doesn't have feathers (go to step 3)

2a. swims (Duck)

b. doesn't swim (Hen)

3a. has legs (Lizard)

b. doesn't have legs (Snake)