Final answer:
The deduction that qualifies as a deductible charitable donation is land donated to a public university.
Step-by-step explanation:
A deduction for a charitable donation can only be claimed if it meets specific criteria. In this case, the deduction that would qualify as a deductible charitable donation is b. Land donated to a public university. This is because donations of land to a public university are considered charitable contributions and are eligible for a tax deduction.
Let's go through the other options:
- Furniture given to a family whose home burned - While this is a kind gesture, it does not qualify as a deductible charitable donation.
- Volunteering at Habitat for Humanity for four hours - This does not involve a monetary donation, so it is not eligible as a deductible charitable contribution.
- Cash contributions to a political campaign - Donations to political campaigns are not considered charitable contributions, so they are not deductible.
Therefore, the only option that qualifies as a deductible charitable donation is b. Land donated to a public university.