Ais a description of policies, procedures or principles within a specific organization that allow database designers to understand the nature, role and scope of data and allow appropriate relationship participation and constraints to be defined for a database.

The correct word to fill in the blank will be the word "Business Rule"

Explanation:

The business rule defines or constrains some aspects of the business and usually involves terms, facts, and rules. The business rule will help the database designers to understand better the nature, role, and scope of data. The business rule tells an organization what it can do in detail with the purpose of control or structure the behavior of the business.

the lake is the bhopal lake