Final answer:
Deductible charitable contributions include cash donations, property donations, and stock donations, but not services.
Step-by-step explanation:
The types of donations that are deductible as charitable contributions typically include cash donations, property donations, and stock donations. Cash donations are straightforward monetary contributions to a qualified organization. Property donations can include physical items such as a house, land, art, rare coins, or stamps that one might buy at one point in time and potentially sell at another. Stock donations involve giving shares of stock to a charity. However, donations in the form of services are generally not deductible, because they represent a contribution of time rather than a tangible asset or money.