Final answer:
An addendum is a supplementary legal document added to a contract to include additional details, such as the terms of a lawn equipment sale in a property transaction.
Step-by-step explanation:
After preparing a contract of sale for her seller, Ginger attached an agreement about the lawn equipment, known as an addendum. An addendum is a supplementary document that is added to the original contract to include additional terms, conditions, or information not specified in the main contract. This legal document can be used to include items such as lawn equipment or other personal property in the sale of a property.