An Attribute That Must Have a Value for Every Entity

question 19

Multiple Choice

An attribute that must have a value for every entity (or relationship) instance is a(n) :

• A) composite attribute.
• B) required attribute.
• C) optional attribute.
• D) multivalued attribute.

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Definitions:

Cool Pocket

Areas or microclimates that experience lower temperatures than their surrounding environments, often due to natural or artificial shading and ventilation.

Dust Bowl

A period during the 1930s characterized by severe dust storms, significantly damaging the ecology and agriculture of the US and Canadian prairies.

Transportation

The movement of people or goods from one place to another using various modes such as cars, trains, ships, or planes.

North America

A continent that includes Canada, the United States, Mexico, and Greenland, characterized by diverse ecosystems and cultures.