Introduction:
In the field of database management, normalization is a technique used to organize data in a structured and efficient manner. It involves structuring the database tables to eliminate redundancy and ensure data integrity. Normalization is achieved by dividing larger tables into smaller, more manageable tables and establishing relationships between them.

Explanation:
Normalization is divided into several normal forms, including 1NF, 2NF, 3NF, 4NF, and 5NF. Each normal form has specific rules and requirements that need to be met for a database to be considered normalized.

1. First Normal Form (1NF):
1NF is the most basic form of normalization. In this form, the data is organized into tables, and each column contains only atomic values (i.e., indivisible). There should be no repeating groups or arrays within a single column.

2. Second Normal Form (2NF):
2NF builds upon 1NF and introduces the concept of functional dependencies. In this form, all non-key attributes must be functionally dependent on the entire primary key. This means that each non-key attribute should depend on the entire primary key, not just a part of it.

3. Third Normal Form (3NF):
3NF further refines the normalization process by eliminating transitive dependencies. In this form, all non-key attributes must be functionally dependent on the primary key and not on other non-key attributes. Transitive dependencies occur when a non-key attribute depends on another non-key attribute, which in turn depends on the primary key.

4. Fourth Normal Form (4NF):
4NF focuses on eliminating multi-valued dependencies. In this form, the database tables are structured in such a way that there are no non-trivial multi-valued dependencies between attributes. A multi-valued dependency occurs when a set of attributes depends on another set of attributes, independent of the primary key.

5. Fifth Normal Form (5NF):
5NF, also known as Project-Join Normal Form (PJNF), is the highest level of normalization. It deals with eliminating join dependencies. A join dependency occurs when a table can be decomposed into multiple tables, each having a subset of attributes, and still be able to reconstruct the original table through a join operation.

Answer:
Out of the given options, 4NF is the correct answer because it specifically deals with multi-valued dependencies. In 4NF, the database tables are structured to eliminate non-trivial multi-valued dependencies between attributes. The other options (2NF, 3NF, and 5NF) focus on different types of dependencies but not specifically on multi-valued dependencies.