When a structure is declared in a programming language, it refers to the creation of a new user-defined data type. This data type can contain multiple variables of different types, grouped together under a single name. The declaration of a structure does not allocate any memory for the variables within it.

a) It will not allocate any memory:
When a structure is declared, it only defines the blueprint or template for the data type. It specifies the names and types of the variables that will be contained within the structure. However, memory is not allocated at this point.

Explanation:
- The declaration of a structure simply tells the compiler about the existence of a new data type, allowing it to recognize and understand the structure's variables when they are used in the program.
- The purpose of a structure is to provide a way to organize related data. It allows the programmer to create a custom data type that can hold various variables together, making it easier to manage and manipulate data as a whole.
- The structure declaration defines the structure's name and the variables it contains, along with their types. It serves as a blueprint for creating variables of the structure type in the program.
- Memory is not allocated during the structure declaration because the compiler does not know how many instances of the structure will be created or how much memory will be needed for each instance.
- Memory allocation occurs when variables of the structure type are instantiated or initialized using the structure declaration. The memory is allocated based on the size and types of the variables within the structure. This typically happens when a variable of the structure type is declared and initialized separately in the program.

In summary, the declaration of a structure does not allocate any memory. It simply defines the structure's blueprint or template, allowing the programmer to create variables of the structure type. Memory allocation occurs when the variables of the structure type are instantiated or initialized separately in the program.