An example of parallel choices in a key is
a. flower color is red; aa. flower color is blue
a. object can fly; aa. object is black
a. animal has 4 legs; aa. animal has 4 teeth

The answer that would best complete the given statement above would be the first option. An example of parallel choices in a key is A. flower color is red; AA. flower color is blue. This is parallel in a way that both are flowers and the difference is parallel because red and blue are both colors. Hope this helps.

Idon't know how to do this but maybe ask your mom or dad