The correct answer is that it is a dependent clause.
A dependent clause, as the name itself says, depends on a larger clause in order to make sense. As you can see in the example above, that clause is incomplete - it needs to be part of a larger, independent clause in order to get a proper meaning. The other options are all complete sentences, which is something the example is definitely not.
The answer is due and dew. Homophones are words that sound the same but are spelled and used differently. Inthis case, doe and act are not the same pronounciation as do.
V=(1/3)πr²h
Divide both sides by (1/3)πr²
V/( (1/3)πr² )= h
