Dependent Options comes in handy when your website has product options
that are depend upon the selection of the parent options. For example:
In printing press product, clothing products where customers need to
choose color, size, length etc. Dependent options allow you to create
different child options based on parent option values for your website
products. Create different option values based on selected options of
Dependent options are useful in many aspects where customers need to choose options based on previous option selections, it is very powerful yet useful tool in opencart product options.