What does it mean to be "dependent of a visa holder"?

So, I'm a high school student (international) trying to apply for a summer school in the United States. During the application process, there's a prompt that asks for my citizenship status, and one option is "Not a US citizen or permanent resident", while another one is "Not a US citizen or permanent resident but dependent of a visa holder". I'm not sure what does that mean. Hope somebody can explain it to me. Thanks!
Update: I asked them and they said they have useable B1 visas, so they should be visa holders I suppose? I don't understand why "dependent of a visa holder" is equivalent to "us citizen or permanent resident" as the answer below suggests (if we just take the words literally!)
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What is visa dependent?
A Dependent Visa is a type of Visa that permits the spouses and kids to travel to an overseas nation for the purpose of accompanying/joining the family member with a corresponding Visa.What does dependent mean in immigration?
Children of applicants who are 22 or older, and who have depended substantially on the financial support of a parent since before attaining the age of 22 and who are unable to be financially self-supporting due to a physical or mental condition are also included in the new definition of a dependent child.What is dependent visa Poland?
It is needed to be either married or be a dependent child to access a dependent visa. Poland Dependent Visa Consultants allow all who apply to find a way to join their spouse or parents in Poland. The process of migration is very complex. There are many rules according to Poland Dependent Visa Consultants in India.What is ILR dependent visa?
When one or both parents of a child born in the UK are granted ILR, an application can be submitted to the Home Office to Register the child as a British citizen without the child needing to have been granted ILR. Once the application is granted, an application can be made for a British passport for the child.Can dependents of H1B visa holders work?
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