Marlee is a toddler who has learned to fear moving cars. she has also become afraid of moving motorcycles. this is an example

This is an example of a phobia.

Explanation:

When kids are little they can experience anxiety, phobia is a manifestation of a great afection or anxiety. Often phobias in little kids have to do to with a hard situations in their lifes, that affects them, and translates into a extreme fear to something specific. There are multiple types of fobias to something specific.