Question

which of these owns city parks, county parks, state parks, and national parks in the united states? private corporations the citizens of the united states

Explanation:

City, county, state, and national parks in the US are public lands. Private corporations don't own these public parks. Public parks are held in trust for the citizens, meaning the citizens of the US collectively own these parks (managed by government entities on their behalf).

Answer:

the citizens of the United States