In Prolog, dynamic and static predicates are two different ways to define predicates and their behavior within a program. Here's an explanation of the concept and the difference between dynamic and static predicates:

1. Dynamic Predicates :
   * Dynamic predicates are defined using the `dynamic/1` directive in Prolog.
   * A dynamic predicate can have its clauses modified or extended dynamically during program execution.
   * Clauses of dynamic predicates can be added or removed at runtime using predicates like `assertz/1`, `retract/1`, and others.
   * Dynamic predicates are useful when you need to modify or update the definition of a predicate during program execution, such as adding new facts or rules dynamically.
   * Dynamic predicates provide flexibility and allow for the manipulation of program behavior at runtime.

2. Static Predicates :
   * Static predicates are the default in Prolog and do not require any special declaration or directive.
   * Once a static predicate is defined, its clauses cannot be modified or extended during program execution.
   * The clauses of static predicates are fixed and defined statically within the program.
   * Static predicates are typically used for representing fixed knowledge, facts, and rules that remain unchanged throughout the execution of the program.
   * Static predicates provide stability and predictability as their clauses cannot be modified dynamically.