Final answer:
The instructions movb, movl, and movq are valid instructions in x86 assembly language used for moving data between memory locations and registers.
Step-by-step explanation:
In computer programming, movb, movl, and movq are valid instructions that are used to move data between memory locations and registers in the x86 assembly language.
The movb instruction moves a single byte of data, the movl instruction moves a 32-bit (4-byte) data, and the movq instruction moves a 64-bit (8-byte) data. These instructions are commonly used for tasks such as copying values, initializing variables, and passing arguments to functions.