**Procedural language among the following is Relational Algebra**

Relational Algebra is a procedural query language that is used to manipulate and retrieve data from relational databases. It provides a set of operations that can be used to perform various tasks on the database.

**Explanation:**

Relational Algebra is a procedural language because it specifies a series of operations that need to be performed step by step in order to achieve the desired result. It is used to define the sequence of operations that need to be executed on a database to retrieve the desired data.

**Domain Relational Calculus and Tuple Relational Calculus:**

Domain Relational Calculus and Tuple Relational Calculus are both non-procedural query languages. They are used to specify what data needs to be retrieved from a database, but they do not specify how the data should be retrieved.

In Domain Relational Calculus, the queries are expressed in terms of variables and quantifiers, and the result is a set of values that satisfy the given conditions.

In Tuple Relational Calculus, the queries are expressed in terms of tuples, and the result is a set of tuples that satisfy the given conditions.

Both of these languages are declarative languages, which means that they specify what needs to be done rather than how it should be done.

**Query Language:**

Query language is a broad term that refers to any language used to communicate with a database. It can include both procedural and non-procedural languages. SQL (Structured Query Language) is a popular query language that is used to interact with relational databases.

While SQL is primarily a non-procedural language, it does have some procedural elements, such as the ability to use control structures like loops and conditional statements.

**Conclusion:**

Among the given options, Relational Algebra is the procedural language. It provides a set of operations that need to be performed step by step to manipulate and retrieve data from relational databases. Domain Relational Calculus, Tuple Relational Calculus, and Query Language (such as SQL) are either non-procedural or have a mix of procedural and non-procedural elements.