Final answer:
In Martin Luther King Jr.'s "Letter from Birmingham Jail," the denotation of the word "engulf" is a. Cover completely.
Step-by-step explanation:
In Martin Luther King Jr.'s "Letter from Birmingham Jail," the denotation of the word "engulf" is a. Cover completely. The word "engulf" in this context means to completely cover or immerse something, often with a sense of overwhelming force. It signifies the idea of being completely and wholly surrounded or consumed by a particular situation or experience.